To determine how many sisters Sally has, we start by analyzing the information provided in the question:

"Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?"

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Step 1: Understand the Family Composition

• Sally is a girl.
• She has 3 brothers, which means there are 3 male siblings in the family.
• The key phrase is: "Each brother has 2 sisters."

This tells us that from the perspective of each brother, there are 2 female siblings in the family.

---

Step 2: Interpret the Meaning of "Each Brother Has 2 Sisters"

• Since Sally is one of the girls in the family, and each brother has 2 sisters, that means there are 2 girls in total in the family.
• One of those girls is Sally, and the other is her sister.

So, the family consists of:

• 3 boys (Sally's brothers),
• 2 girls (Sally and her one sister).

---

Step 3: Answer the Question

The question is: "How many sisters does Sally have?"

• Sally is a girl, so she doesn't count herself as her own sister.
• There is one other girl in the family — her sister.

Thus, Sally has 1 sister.

---

Final Answer

$$ \boxed{1} $$

Sally has one sister.

Reasoning

• Sally herself is a girl.
• She has 3 brothers.
• Each brother is said to have 2 sisters.
  The two sisters are the same for all three brothers (they share the same siblings).

Thus the total number of sisters in the family is 2. One of those sisters is Sally, leaving one other sister for her. So Sally has one sister.

Alright, let's tackle this problem step by step. The question is:

"Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?"

At first glance, it might seem a bit confusing, but let's break it down to understand it better.

Understanding the Problem

We have a family with several children, and we're given information about Sally and her brothers. Here's what we know:

1. Sally is a girl.
2. Sally has 3 brothers.
3. Each brother has 2 sisters.

We need to determine: How many sisters does Sally have?

Breaking Down the Information

First, let's list out the children in the family based on the information given.

1. Sally: She is one girl in the family.
2. Sally's brothers: There are 3 brothers.

So far, we have:

• Girls: Sally
• Boys: Brother 1, Brother 2, Brother 3

Now, the next piece of information is: "Each brother has 2 sisters."

This means that if we take any one of the brothers, he has 2 sisters.

Determining the Sisters

Let's think about what "each brother has 2 sisters" implies.

• For Brother 1: He has 2 sisters.
• For Brother 2: He has 2 sisters.
• For Brother 3: He has 2 sisters.

Now, who are these sisters? They are the female children in the family.

We already know that Sally is one sister. If each brother has 2 sisters, and Sally is one of them, who is the other sister?

This suggests that there must be another girl in the family besides Sally to make the count of sisters equal to 2 for each brother.

Let's denote the other sister as "Sister 2."

Now, the family looks like:

• Girls: Sally, Sister 2
• Boys: Brother 1, Brother 2, Brother 3

Now, let's check if this satisfies the condition that each brother has 2 sisters.

• For any brother, his sisters are Sally and Sister 2. That's 2 sisters. This checks out.

Verifying the Number of Sisters Sally Has

Now, the question is asking: How many sisters does Sally have?

From our current family setup:

• Sally's siblings are: Brother 1, Brother 2, Brother 3, and Sister 2.

So, Sally has one sister (Sister 2).

But wait, let's double-check to ensure we haven't missed anything.

Re-evaluating the Family Structure

Initially, we thought:

• Sally is one girl.
• 3 brothers.
• Each brother has 2 sisters, implying another sister besides Sally.

But is it possible that Sally is the only sister, and the count is somehow different?

Let's explore that.

If Sally is the only sister:

• Sisters: Sally
• Brothers: 3

Then, each brother would have only 1 sister (Sally), but the problem states that each brother has 2 sisters. This doesn't match, so Sally cannot be the only sister.

Therefore, there must be at least one more sister besides Sally to make the count of sisters equal to 2 for each brother.

Considering More Sisters

Could there be more than one other sister? Let's see.

If there are two other sisters besides Sally (let's call them Sister 2 and Sister 3), then:

• Sisters: Sally, Sister 2, Sister 3
• Brothers: 3

Now, each brother would have 3 sisters, but the problem says each brother has 2 sisters. This is too many, so we can't have more than one other sister.

Therefore, the only possibility is:

• Sisters: Sally, Sister 2
• Brothers: 3

This gives each brother exactly 2 sisters (Sally and Sister 2), which matches the given information.

Final Count of Sally's Sisters

Now, the question is: How many sisters does Sally have?

Sally's siblings are:

• Brothers: 3
• Sisters: Sister 2

So, Sally has 1 sister.

Potential Missteps

Initially, one might think that since each brother has 2 sisters, and there are 3 brothers, there are 6 sister instances (3 brothers × 2 sisters each), leading to the idea that there are 6 sisters. But this would be incorrect because all brothers share the same sisters; the sisters aren't unique to each brother.

Another possible confusion is thinking that Sally is not included in the count of sisters for the brothers, leading to an incorrect addition. But Sally is indeed one of the sisters that the brothers have.

Conclusion

After carefully analyzing the family structure and ensuring that all given conditions are met, we conclude that:

Sally has 1 sister.

To solve this problem, we need to find the number of sisters Sally has based on the given information.

Given information:

• Sally has 3 brothers.
• Each brother has 2 sisters.

Step 1: Find the total number of sisters the brothers have. Number of sisters each brother has × Number of brothers = Total number of sisters the brothers have 2 × 3 = 6

Step 2: Since Sally is also a sister to her brothers, we need to subtract 1 from the total number of sisters to find the number of sisters Sally has. Total number of sisters the brothers have - 1 (Sally herself) = Number of sisters Sally has 6 - 1 = 5

Therefore, Sally has 5 sisters.

Let me help solve this word problem step by step.

Let's break it down:

1. Sally is a girl
2. Sally has 3 brothers
3. Each brother has 2 sisters

The key insight here is that if each brother has 2 sisters, and we know Sally is one of those sisters, then all brothers must share the same sisters.

Since each brother has 2 sisters total, and we know Sally is one of them, there must be one other sister.

Therefore, Sally has 1 sister.

To verify:

• Sally + her 1 sister = 2 sisters total
• This matches the fact that each of the 3 brothers has 2 sisters

The answer is 1 sister.

This is an interesting logical reasoning problem! Let's work through it step by step.

We know:

• Sally is a girl
• Sally has 3 brothers
• Each brother has 2 sisters

The key insight is that Sally herself counts as a sister to her brothers. So when we're told that "each brother has 2 sisters," Sally is one of those sisters.

Since each brother has 2 sisters total, and Sally is one of them, that means each brother has 1 sister besides Sally.

But all brothers share the same sisters (they're all siblings in the same family). So if Sally has 3 brothers, and each brother has the same 2 sisters (Sally and someone else), then Sally has exactly 1 sister.

Therefore, Sally has 1 sister.

To solve this problem, I need to analyze the relationships carefully.

Given:

• Sally (a girl) has 3 brothers
• Each brother has 2 sisters

Since Sally is a girl, she counts as a sister to her brothers. So each of Sally's brothers has Sally as one of their sisters.

If each brother has 2 sisters total, and one of those sisters is Sally, then there must be exactly 1 other sister that all the brothers share.

Therefore, Sally has 1 sister.

I need to figure out how many sisters Sally has.

Given information:

• Sally is a girl
• Sally has 3 brothers

Now, each brother has 2 sisters.

If each of Sally's brothers has 2 sisters, and Sally is one of those sisters, then there must be one more sister besides Sally.

Let me verify:

• Total sisters in the family: Sally + 1 other sister = 2 sisters
• Each of the 3 brothers would have these same 2 sisters
• This checks out ✓

Therefore, Sally has 1 sister.

I need to work through this step-by-step.

Given information:

• Sally is a girl
• Sally has 3 brothers
• Each brother has 2 sisters

Since Sally is one of the sisters that each brother has, and each brother has 2 sisters total, that means th ere must be exactly 2 sisters in the family.

The 2 sisters are:

1. Sally
2. One other sister

Therefore, Sally has 1 sister.

Let me work through this step-by-step.

Sally has 3 brothers.

Each of Sally's brothers has 2 sisters.

Since Sally is a girl, she is one of the sisters that each brother has.

If each brother has 2 sisters total, and Sally is one of them, then there must be 1 other sister besides Sally.

Therefore, Sally has 1 sister.

I need to figure out how many sisters Sally has.

Let me work through this step-by-step.

Given information:

• Sally is a girl
• Sally has 3 brothers
• Each brother has 2 sisters

Key insight: Sally's brothers are also Sally's siblings, so they share the same sisters. When we're told "each brother has 2 sisters," those sisters include Sally herself.

Working it out: If each brother has 2 sisters, and Sally is one of those sisters, then there must be 2 sisters total in the family (Sally + 1 other sister).

Answer: Sally has 1 sister.

I need to think through this step-by-step.

Given information:

• Sally is a girl
• Sally has 3 brothers
• Each brother has 2 sisters

Let me work out how many sisters are in the family total.

If each of Sally's 3 brothers has 2 sisters, and all the brothers are in the same family, then there must be 2 sisters total in the family.

Since Sally is one of those sisters, and there are 2 sisters total, Sally must have 1 sister.

Therefore, Sally has 1 sister.

Breaking Down the Problem

Let me identify the people in this family.

Sally's brothers: Sally has 3 brothers.

Each brother's sisters: Each brother has 2 sisters. Who are a brother's sisters? They would be Sally and any other girls in the family.

Since each brother has 2 sisters, and Sally is one of them, there is 1 other sister.

Answer

Sally has 1 sister.

Let's analyze the problem step by step:

• Sally has 3 brothers. So, including Sally, there are at least 4 children: Sally (a girl) and 3 boys.
• Each brother has 2 sisters. Since the brothers share the same siblings, each brother has the same number of sisters.

Now, from the perspective of one brother:

• The sisters are the female siblings. Since Sally is one sister, and each brother has 2 sisters, there must be another sister besides Sally.

Therefore, the family has:

• 2 girls (Sally and one more sister)
• 3 boys (the brothers)

So, Sally has 1 sister (the other girl) and 3 brothers.

Thus, Sally has 1 sister.

Final Answer: [ \boxed{1} ]

Let's break down the problem step by step to find out how many sisters Sally has.

Problem Statement: Sally has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

Understanding the Relationships:

1. Sally's Brothers:

   • Sally has 3 brothers.

2. Brothers' Sisters:

   • Each brother has 2 sisters.

Analyzing the Information:

• Since Sally is a girl, she is one of the sisters that her brothers have.

• Let's denote the number of sisters Sally has as S.

Setting Up the Equation:

• Total sisters that each brother has = Number of sisters Sally has (S) + Sally herself.

  However, since Sally is included in the count of sisters, we need to ensure we don't double-count her.

Calculating the Number of Sisters:

1. From Sally's Perspective:

   • Sally has S sisters.

2. From Each Brother's Perspective:

   • Each brother has 2 sisters.
   • These 2 sisters include Sally and her sisters.

Relating Both Perspectives:

• The number of sisters each brother has (which is 2) should be equal to the number of sisters Sally has (S) plus Sally herself.

  Therefore:

  [ S + 1 = 2 ]

  Here, S + 1 accounts for Sally and her sisters.

Solving for S:

[ S + 1 = 2 \ S = 2 - 1 \ S = 1 ]

Conclusion:

Sally has 1 sister.

Verification:

• Sally has 3 brothers.

• Each brother has 2 sisters: Sally and her 1 sister.

  This satisfies the condition that each brother has 2 sisters.

Final Answer:

Sally has 1 sister.

Let's go step by step.

---

Step 1: Identify Sally's family from her point of view

Sally is a girl.
She has 3 brothers.
So there are 3 boys in the family and Sally (1 girl so far).

---

Step 2: Consider the statement "Each brother has 2 sisters"

From a brother's perspective, his sisters are all the girls in the family except himself (since he’s a boy).
If each brother has 2 sisters, that means there are 2 girls in the family total, from the brother’s point of view.

---

Step 3: Determine the number of girls

We already know Sally is one of these girls.
If there are 2 girls total, then Sally has 1 sister.

---

Step 4: Conclusion

Sally has 1 sister.

---

[ \boxed{1} ]

Alright, let's tackle the problem step by step to ensure we understand it fully and arrive at the correct answer.

Problem Statement: Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

Understanding the Problem: We need to determine the number of sisters Sally has, given the information about her brothers and their sisters.

Breaking It Down:

1. Sally's Brothers:

   • Sally has 3 brothers.

2. Brothers' Sisters:

   • Each brother has 2 sisters.

Key Point to Note: When it's mentioned that each brother has 2 sisters, it's important to recognize that Sally herself is one of those sisters.

Let's Visualize the Family:

• Total Brothers: 3
• Sisters per Brother: 2

Since Sally is one of the sisters, the total number of sisters includes her and possibly others.

Calculating the Number of Sisters:

Each of the 3 brothers has 2 sisters. Since Sally is one sister common to all brothers, we can determine how many additional sisters there are.

Let's denote:

• Total sisters = Number of sisters each brother has

But we know that Sally is one of those sisters. Therefore:

Total sisters = Sally + (Number of additional sisters)

Given that each brother has 2 sisters, and Sally is one of them, there must be one more sister.

So, Total sisters = 1 (Sally) + 1 (additional sister) = 2 sisters

Verification:

Let's verify this to ensure accuracy.

• Sally has 3 brothers.
• Each brother has 2 sisters: Sally and one more sister.
• Therefore, the total number of sisters is 2 (Sally and her sister).

This aligns with our calculation.

Common Pitfall:

A common mistake might be to think that since each brother has 2 sisters, and there are 3 brothers, there are 3 x 2 = 6 sisters. However, this overlooks the fact that Sally is the same sister for all brothers, so we're not adding unique sisters with each brother.

Conclusion:

After carefully analyzing the relationships and ensuring we account for Sally being one of the sisters, we conclude that Sally has 1 sister besides herself.

Final Answer: Sally has 1 sister.

Alright, let's tackle this problem step by step. I'll start by understanding the information given and then try to visualize the family structure to find out how many sisters Sally has.

Understanding the Problem

We have the following information:

1. Sally is a girl.
2. Sally has 3 brothers.
3. Each brother has 2 sisters.

The question is: How many sisters does Sally have?

At first glance, it might seem straightforward, but let's break it down to ensure we don't miss anything.

Identifying Family Members

First, let's list out the family members based on the information:

• Sally: She is a girl.
• Brothers: Sally has 3 brothers. Let's name them for clarity: Brother A, Brother B, and Brother C.

So far, the family consists of:

• Sally
• Brother A
• Brother B
• Brother C

Now, the next piece of information is that each brother has 2 sisters.

Analyzing "Each Brother Has 2 Sisters"

This is where we need to be careful. The statement says that each of Sally's brothers has 2 sisters.

Let's think about what this means for one brother, say Brother A:

• Brother A has 2 sisters.

Who could these sisters be?

We already know that Sally is a sister to Brother A because Sally is a girl and Brother A is her brother. So, one of Brother A's sisters is Sally.

But the statement says Brother A has 2 sisters, not just one. So, there must be another sister besides Sally.

This implies that there is another girl in the family who is a sister to Brother A.

Similarly, this would apply to Brother B and Brother C as well. Each of them has 2 sisters: one is Sally, and the other is this additional sister.

Determining the Additional Sister

From the above, we can deduce that there is another sister besides Sally.

Let's name this additional sister: Sister X.

Now, let's list all the siblings:

1. Sally
2. Sister X
3. Brother A
4. Brother B
5. Brother C

Now, let's verify the condition that each brother has 2 sisters:

• Brother A's sisters: Sally and Sister X → 2 sisters.
• Brother B's sisters: Sally and Sister X → 2 sisters.
• Brother C's sisters: Sally and Sister X → 2 sisters.

This checks out.

Counting Sally's Sisters

Now, the question is: How many sisters does Sally have?

From our list:

• Sally's siblings are: Sister X, Brother A, Brother B, Brother C.

Out of these, the sisters are Sister X.

So, Sally has 1 sister: Sister X.

Verifying the Answer

Let me double-check to ensure this makes sense.

• Total siblings: Sally, Sister X, Brother A, Brother B, Brother C → 5 children in total.
• Brothers: 3 (Brother A, B, C).
• Sisters: 2 (Sally and Sister X).

Now, for each brother:

• Number of sisters they have: 2 (Sally and Sister X).

This matches the given information that each brother has 2 sisters.

Now, for Sally:

• Her sisters: Only Sister X (since Sally is a girl, she doesn't count herself as her own sister).

Therefore, Sally has 1 sister.

Potential Missteps

Initially, one might think that since each brother has 2 sisters, and there are 3 brothers, the total number of sisters is 2 (as each brother's sisters are the same two girls).

But the key is to realize that Sally is one of those sisters, and the other sister is someone else.

Another way to look at it is:

• Total sisters in the family: Let's say S.
• We know Sally is one sister, so S ≥ 1.
• Each brother has 2 sisters, meaning S = 2 (since all brothers share the same sisters).
• Therefore, sisters are Sally and one other, making S = 2.
• Hence, Sally's sisters are the other sister, so 1.

Conclusion

After carefully analyzing the relationships and verifying the counts, it's clear that:

Sally has 1 sister.

Here's how to solve this classic riddle:

• Focus on the family: All the brothers and sisters are part of the same family.
• Brothers share sisters: If one brother has 2 sisters, then all the brothers in that family share the same sisters.

Since each brother has 2 sisters, and Sally is a sister in the family, those 2 sisters must include Sally and one other sister.

Therefore, Sally has 2 sisters.

Here's how to solve this:

1. Focus on the brothers' perspective: Each of Sally's 3 brothers has 2 sisters.
2. Identify the sisters: Since Sally is a girl, she is one of those sisters. The other sister must be another girl in the family.
3. Determine the total number of girls: If each brother has 2 sisters, there are only 2 girls in the family (Sally and one other sister).
4. Count Sally's sisters: If there are 2 girls in total, and Sally is one of them, then Sally has 1 sister.

Answer: Sally has 1 sister.

Sally has 1 sister.

Explanation:

• Sally is a girl.
• She has 3 brothers.
• All the siblings share the same sisters. Since Sally is one of the sisters, and each brother has 2 sisters in total, there must be one other girl besides Sally in the family.
• Therefore, Sally has 1 sister.

This is a bit of a riddle!

Here's how to figure it out:

1. The Brothers' Sister: Sally is a girl who has 3 brothers. This means Sally is one of the sisters that each of those brothers has.
2. The Other Sisters: The riddle states that each brother has 2 sisters. Since Sally is already one sister, there must be one more sister to make a total of 2 sisters for each brother.

So, Sally has 1 sister.

Sally has 3 brothers, meaning there are 3 boys in the family. Each brother has 2 sisters, indicating that there are exactly 2 girls in the family. Since Sally is one of the girls, there must be one additional sister. Therefore, Sally has one sister.

This can be verified by considering the family composition:

• Sisters: Sally and one other girl.
• Brothers: 3 boys.

From Sally's perspective:

• She has 3 brothers.
• She has 1 sister (the other girl).

From each brother's perspective:

• They have 2 sisters (Sally and the other girl).

This satisfies both conditions: Sally has 3 brothers, and each brother has 2 sisters.

If there were only one sister (Sally), then each brother would have only one sister, which contradicts the information that each brother has 2 sisters. If there were three sisters, then each brother would have three sisters, which also contradicts the information that each brother has 2 sisters. Thus, there must be exactly two sisters, meaning Sally has one sister.

\boxed{1}

Sally has 3 brothers, meaning there are 3 boys in the family besides Sally. Each brother has 2 sisters, which means there are 2 girls in the family from the perspective of any brother. Since Sally is one of these girls, there must be one other girl in the family.

Therefore, Sally has one sister.

This can be verified by considering the family composition:

• Girls: Sally and one other sister (let's call her Anna).
• Boys: Three brothers.

From Sally's perspective:

• She has 3 brothers (the three boys).
• She has 1 sister (Anna).

From the perspective of any brother:

• They have 2 sisters (Sally and Anna).

The conditions are satisfied: Sally has 3 brothers, and each brother has 2 sisters. If there were only one girl (Sally), each brother would have only one sister, which contradicts the given information. If there were three girls, each brother would have three sisters, which also contradicts the given information. Thus, there must be exactly two girls in the family.

\boxed{1}

Let's break down the problem:

• Sally is a girl.
• She has 3 brothers.
• Each brother has 2 sisters.

Let's name the siblings:

• Sally (girl)
• Brother 1
• Brother 2
• Brother 3

Now, the key: Each brother has 2 sisters.

Since Sally is one of the sisters, let's see if there are more:

Suppose there is only one girl (Sally) in the family.

• Then each brother would have only 1 sister: Sally.
• But the problem says they have 2 sisters each.

Thus, Sally must have one sister (since the brothers must have 2 sisters). Let's call this other sister "Anna".

So the siblings are:

• Sally (girl)
• Anna (girl)
• Brother 1
• Brother 2
• Brother 3

Now, each brother has 2 sisters: Sally and Anna.

So, how many sisters does Sally have?

• Sally's sisters = 1 (Anna).

Final Answer:

Sally has 1 sister.

Let's analyze the information:

• Sally has 3 brothers.
• Each brother has 2 sisters.

Since Sally is a girl and one of the sisters, for each brother to have 2 sisters, it means there must be a total of 2 sisters in the family (including Sally).

Therefore:

• Total number of sisters = 2
• Sally is one of them
• So, Sally has 1 sister

Answer: Sally has 1 sister.

Let's break this down step by step. Sally is a girl and has 3 brothers. The problem states that each of these brothers has 2 sisters.

Since Sally herself is one of the sisters (as she is a female sibling to her brothers), there must be one other sister to make the total number of sisters for each brother equal to 2. Therefore, the family consists of 2 girls (Sally and her sister) and 3 boys (Sally's brothers).

From Sally's perspective, the number of sisters she has is the number of other girls in the family besides herself. Since there is 1 other girl, Sally has 1 sister.

Answer: Sally has 1 sister.

Based on the details in the riddle, Sally has exactly 1 sister.

Quick Explanation

• Sally (a girl) has 3 brothers. That's straightforward.
• Each of those brothers has exactly 2 sisters (female siblings).
• This can only be true if there are exactly 2 girls in the family total (Sally + 1 more).
• Therefore, Sally herself must have exactly 1 sister (the other girl).

Family Breakdown

• Boys: 3 total (Sally's brothers).
• Girls: 2 total (Sally + 1 sister).
• From any brother's perspective: He has 2 brothers (male siblings) and 2 sisters (female siblings). This matches the riddle exactly.
• From Sally's perspective: She has 3 brothers (male siblings) and 1 sister (female sibling). Again, this matches.

If there were more (or fewer) than 2 girls total, the "each brother has 2 sisters" part of the riddle couldn't possibly be true. No other interpretation fits the facts as stated.

Common Mistake to Avoid

Some people misread this type of riddle and try to multiply things (e.g., "3 brothers × 2 sisters each = 6 sisters"), but that's incorrect because it massively overcounts the same sisters. There's no need for math here beyond basic counting of boys vs. girls. The family simply has 3 boys and 2 girls, as explained above.

If this doesn't match what you think the answer is, or if there's more context I'm missing, feel free to reply!

Sally has 1 sister.

Sally is a girl with 3 brothers. Each of those 3 brothers has 2 sisters (including Sally). This means there are 2 girls total in the family (Sally and 1 other sister), and 3 boys total. Sally has 1 sister. The brothers are the same for everyone—Sally herself has 3 brothers.

2

Explanation: The three brothers share the same siblings. Each brother has 2 sisters, and one of them is Sally. So there must be exactly 2 girls in the family: Sally plus one other sister. Therefore, Sally has 1 other sister besides herself, which means she has 1 sister? Wait—question asks "How many sisters does Sally have?" Since there are 2 sisters total, and one is Sally, the number of sisters Sally has is 1. Correction: The correct answer is 1.

Sally has 2 sisters.

Reason: “Each brother has 2 sisters.” The brothers are Sally’s 3 brothers. Those brothers’ two sisters must be Sally and one other girl. Therefore, there are 2 girls total among the siblings, so Sally has 1 other sister besides herself. Hence, Sally has 1 sister, but the question asks “How many sisters does Sally have?” Answer: 1.

Correction: The phrasing can be confusing. The correct answer is 1 sister (not 2).

Sally has 3 brothers, meaning there are 3 boys in the family. Each brother has 2 sisters, meaning there are 2 girls in the family. Since Sally is one of the girls, there must be one other girl. Therefore, Sally has 1 sister.

This can be verified by considering the family structure:

• Total children: 2 girls (Sally and one sister) and 3 boys.
• From Sally's perspective: She has 3 brothers and 1 sister.
• From each brother's perspective: They have 2 sisters (Sally and the other girl) and 2 brothers (the other two boys, as they do not count themselves when referring to brothers).

If there were only 1 girl (Sally), each brother would have only 1 sister, contradicting the statement that each has 2 sisters. If there were 3 girls, each brother would have 3 sisters, also contradicting the statement. Thus, exactly 2 girls is the only consistent scenario.

Therefore, Sally has 1 sister.

\boxed{1}

Let's break it down:

• Sally is a girl.
• She has 3 brothers.
• Each brother has 2 sisters.

Since Sally is one of those sisters, and the brothers each have 2 sisters, that means there must be 2 girls in total: Sally and one more sister.

✅ Final Answer:

Sally has 1 sister.

Sally has 1 sister.

Here is the breakdown:

1. The Brothers' Perspective: The puzzle states that each brother has 2 sisters. Since Sally is a girl, she is one of those sisters.
2. Finding the Second Sister: There must be another sister for the brothers to have a total of two.
3. Sally's Perspective: Since Sally is already counted as one of the sisters, the "other" sister is the only additional girl in the family.

Therefore, the family consists of:

• Sally (Girl)
• 1 other sister (Girl)
• 3 brothers (Boys)

Sally has 1 sister.

Sally has 3 brothers, meaning there are 3 boys in the family.
Each brother has 2 sisters. Since the brothers' sisters are the girls in the family, and one of them is Sally, there must be one other sister to make it 2 sisters per brother.
Therefore, there are 2 girls in total: Sally and one other sister.
From Sally's perspective, she has 1 sister (the other girl).

Answer: 1

Sally has 1 sister.

Explanation

• Sally is a girl and has 3 brothers.
• Each brother has exactly 2 sisters.
• The sisters are all the female children in the family (Sally plus any other sisters).

If each brother sees 2 sisters, the total number of girls in the family must be 2. Since Sally is one of those girls, there must be exactly one other girl. Therefore, Sally has one sister.

Alright, let's tackle this problem step by step. The question is:

"Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?"

At first glance, it might seem a bit confusing, but let's break it down to understand it better.

Understanding the Problem

We have a family with several children, including Sally and her brothers and sisters. Here's what we know:

1. Sally is a girl.
2. Sally has 3 brothers.
3. Each brother has 2 sisters.

We need to determine how many sisters Sally has.

Identifying the Siblings

First, let's list out the siblings based on the information given.

• Sally: She is one girl in the family.
• Brothers: Sally has 3 brothers. So, there are 3 boys in the family.

Now, the next piece of information is that "each brother has 2 sisters."

This means that if you pick any one of the 3 brothers, that brother has 2 sisters.

Determining the Sisters

Here's where it might get a bit tricky. We know Sally is one sister, but are there more?

Let's think about what "each brother has 2 sisters" implies.

If a brother has 2 sisters, those sisters must include Sally and possibly another girl.

But wait—Sally is already one sister. So, if a brother has 2 sisters, and one is Sally, who is the other one?

This suggests that there must be at least one more sister besides Sally to make the count of sisters equal to 2 for each brother.

Let's test this:

• Suppose there is only Sally as the sister. Then each brother would have only 1 sister (Sally), but the problem states each has 2 sisters. So, this can't be the case.

• Therefore, there must be another sister besides Sally.

So, the sisters are:

1. Sally
2. Another girl (let's call her, say, Emily)

Now, let's check if this satisfies the condition that each brother has 2 sisters.

Each brother's sisters would be:

• Sally
• Emily

That's 2 sisters, which matches the given information.

Verifying the Number of Sisters

Now, the question is asking: How many sisters does Sally have?

We've established that the sisters in the family are:

• Sally
• Emily

But the question is about Sally's sisters, not including herself.

So, Sally's sisters are:

• Emily

That's 1 sister.

Wait a minute, but earlier we thought there are 2 sisters in total (Sally and Emily), but Sally's sisters would be just Emily, making it 1 sister.

But let's double-check the initial interpretation to ensure we didn't make a mistake.

Re-evaluating the Interpretation

The confusion might arise from how we're counting the sisters.

Total sisters in the family:

• Sally
• Emily

Total brothers: 3

Now, "each brother has 2 sisters." Each brother's sisters are Sally and Emily, which is 2. This checks out.

Now, how many sisters does Sally have?

Sally's sisters are the other girls in the family besides herself, which is Emily. So, Sally has 1 sister.

But let me think if there could be more sisters.

Suppose there are 3 sisters: Sally, Emily, and another girl (let's say, Anna).

Then each brother would have 3 sisters (Sally, Emily, Anna), but the problem says each has 2 sisters. So, this can't be.

Therefore, the only possibility is that there are 2 sisters in total: Sally and Emily.

Thus, Sally has 1 sister.

Potential Misinterpretation

Initially, one might think that since each brother has 2 sisters, and there are 3 brothers, there are 6 sister instances (3 brothers × 2 sisters each), leading to more sisters. But this would be incorrect because all brothers share the same sisters; the sisters aren't unique to each brother.

For example, if there are 2 sisters, each of the 3 brothers has those 2 sisters, totaling 6 sister instances (3 brothers × 2 sisters), but the actual number of sisters is just 2.

Final Confirmation

Let's confirm with the numbers:

• Sisters: Sally and Emily (total 2 girls)
• Brothers: 3 boys

Each brother's sisters: Sally and Emily (2 sisters) — matches the given information.

Sally's sisters: Emily (1 sister)

Therefore, Sally has 1 sister.

Conclusion

After carefully analyzing the problem and considering the relationships, the correct answer is:

Sally has 1 sister.

Alright, let's tackle this problem step by step. The question is:

Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

At first glance, it seems straightforward, but let's break it down to ensure we understand it correctly.

Understanding the Problem

1. Sally's Brothers: We're told that Sally has 3 brothers. So, in the family, there are Sally and her 3 brothers. That's 1 girl (Sally) + 3 boys = 4 children so far.

2. Each Brother's Sisters: Now, it's stated that each brother has 2 sisters. This is where we need to be careful. Who are these sisters?

   • One sister is definitely Sally, since she's a girl in the family.
   • The other sister must be someone else because the number is 2, not 1.

Identifying the Sisters

Let's list out the siblings based on the information:

• Sally: Girl
• Brother 1: Boy
• Brother 2: Boy
• Brother 3: Boy

Now, for each brother, they have 2 sisters. We know one sister is Sally. So, where does the other sister come from?

This implies there must be another girl in the family besides Sally. Let's call this other sister "Anna" for clarity.

So now, the siblings are:

• Sally: Girl
• Anna: Girl
• Brother 1: Boy
• Brother 2: Boy
• Brother 3: Boy

Now, let's verify:

• Sally's brothers: Brother 1, Brother 2, Brother 3 (3 brothers) — matches the given.
• Each brother's sisters:
  • Brother 1's sisters: Sally and Anna (2 sisters)
  • Brother 2's sisters: Sally and Anna (2 sisters)
  • Brother 3's sisters: Sally and Anna (2 sisters)

This checks out.

Counting Sally's Sisters

Now, the question asks: How many sisters does Sally have?

From our list:

• Sally's siblings: Anna, Brother 1, Brother 2, Brother 3.
• Sisters: Anna.

So, Sally has 1 sister (Anna).

Wait a minute, but earlier we thought there are two sisters (Sally and Anna). But the question is about how many sisters Sally has, not how many sisters there are in total.

Sally is a girl, and Anna is another girl. So, from Sally's perspective, her sister is Anna. She doesn't count herself when counting her sisters.

Verifying the Count

Let me rephrase to ensure clarity:

• Total girls in the family: Sally and Anna (2 girls).
• Total boys in the family: 3 brothers.

For any brother:

• Sisters are Sally and Anna (2 sisters) — matches the given.

For Sally:

• Sisters: Only Anna (since Sally doesn't count herself).

Therefore, Sally has 1 sister.

Potential Missteps

Initially, one might think that since each brother has 2 sisters, and one is Sally, the other must be another sister, leading to the conclusion that there are 2 sisters in total (Sally and one more). Then, when asked how many sisters Sally has, one might mistakenly say 2, counting both Sally and the other sister. But that would be incorrect because Sally cannot be her own sister.

The correct interpretation is that the "2 sisters" each brother has are Sally and one other sister (let's say Anna). Therefore, Sally's sisters are just Anna, making it 1 sister.

Final Answer

After carefully analyzing the information:

Sally has 1 sister.

Alright, let's tackle this problem step by step. The question is:

Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

At first glance, it might seem straightforward, but let's break it down to ensure we understand it correctly.

Understanding the Problem

We have a family with several children, and we're given specific information about Sally and her brothers. Here's what we know:

1. Sally is a girl: This means Sally is one of the daughters in the family.
2. Sally has 3 brothers: So, there are three male siblings in the family.
3. Each brother has 2 sisters: This is a crucial piece of information. It tells us something about the total number of sisters in the family from each brother's perspective.

Our goal is to determine how many sisters Sally has.

Visualizing the Family

Sometimes, drawing a simple diagram or listing out the information can help. Let's try that.

Let's denote:

• Sally: S (female)
• Brothers: B1, B2, B3 (all male)

So, currently, we have:

• Sisters: S
• Brothers: B1, B2, B3

Now, the statement says "each brother has 2 sisters." Let's interpret what that means for one brother, say B1.

From B1's perspective:

• He is a brother, so he doesn't count himself as a sister.
• He has sisters: S (Sally) and possibly others.

But we're told he has 2 sisters. Currently, we only have S as a sister. So, where does the second sister come from?

This implies that there must be another sister besides Sally. Let's call this other sister S2.

Now, our family looks like:

• Sisters: S (Sally), S2
• Brothers: B1, B2, B3

Now, let's check if this fits the given information.

Verifying the Information

1. Sally has 3 brothers: Yes, B1, B2, B3.
2. Each brother has 2 sisters:
   • For B1: sisters are S and S2 → 2 sisters.
   • For B2: sisters are S and S2 → 2 sisters.
   • For B3: sisters are S and S2 → 2 sisters.

This checks out. Each brother indeed has 2 sisters.

Determining Sally's Sisters

Now, the question is: How many sisters does Sally have?

From our current family structure:

• Sisters: S (Sally), S2
• Brothers: B1, B2, B3

Sally is one of the sisters. So, her sisters would be the other sisters in the family besides herself.

That is:

• Sally's sisters: S2

So, Sally has 1 sister.

Potential Missteps

Initially, one might think that since each brother has 2 sisters, and there are 3 brothers, the total number of sisters is 2 (because each brother counts the same sisters). However, this would imply that the number of sisters is independent of the number of brothers in terms of counting.

But the key is to realize that the sisters are shared among all brothers. That is, the sisters are the same for each brother. So, if each brother has 2 sisters, and all brothers share the same sisters, then the total number of sisters is 2 (including Sally).

But the question asks for how many sisters Sally has, not the total number of sisters in the family.

Sally is one sister, and there's another sister (S2), so Sally has 1 sister.

Alternative Approach

Let me think of it another way to confirm.

Let’s denote:

• Total sisters = S
• Total brothers = B

Given:

• Sally is a girl, so she is one of the sisters.
• Sally has 3 brothers: B = 3
• Each brother has 2 sisters: So, for each brother, number of sisters = 2

But the sisters are the same for all brothers. So, the total number of sisters is 2 (since each brother counts the same sisters).

But Sally is one of these sisters. So, the other sister is 2 (total sisters) - 1 (Sally) = 1.

Therefore, Sally has 1 sister.

Checking with Numbers

Let's assign numbers to see if it makes sense.

Suppose:

• Sisters: Sally (S), Sister X (SX)
• Brothers: Brother 1 (B1), Brother 2 (B2), Brother 3 (B3)

Now:

• Sally has 3 brothers: B1, B2, B3 → correct.
• Each brother has 2 sisters:
  • B1: S, SX → 2
  • B2: S, SX → 2
  • B3: S, SX → 2

This fits perfectly.

If we had only Sally as a sister:

• Sisters: Sally
• Brothers: B1, B2, B3 Then each brother would have only 1 sister (Sally), but the problem states each has 2 sisters. So, this can't be the case.

If we had Sally and two other sisters:

• Sisters: S, SX, SY
• Brothers: B1, B2, B3 Then each brother would have 3 sisters, which contradicts the given that each has 2.

So, the only configuration that fits is:

• Sisters: S, SX
• Brothers: B1, B2, B3

Thus, Sally has 1 sister (SX).

Conclusion

After carefully analyzing the problem from different angles and verifying each step, the correct answer is:

Sally has 1 sister.

To determine how many sisters Sally has, let's analyze the information step by step:

1. Sally is a girl, and she has 3 brothers.
   This means there are 3 boys in the family (her brothers).

2. Each brother has 2 sisters.
   From the perspective of any one brother, he sees 2 girls in the family.
   Since Sally is one of the girls, there must be one more girl besides Sally to make up the 2 sisters each brother counts.

3. Total number of girls in the family:

   • Sally (1 girl)
   • The other sister (1 girl)
     Total = 2 girls

4. How many sisters does Sally have?
   Sally herself is one of the girls, so the number of sisters she has is the other girl(s).
   Since there are 2 girls total and Sally is one, she has 1 sister.

---

Answer: Sally has 1 sister.

To determine how many sisters Sally has, we can break down the information given in the problem step by step.

1. Identify the number of brothers Sally has. According to the problem, Sally has 3 brothers.
2. Each of Sally's brothers has 2 sisters. Since Sally is one of the sisters, the other sister must be the same for all brothers. Therefore, the other sister is the same person, not a different sister for each brother.

Let's denote the sisters as follows:

• Sally is one sister.
• Let's call the other sister ( S ).

Since each brother has 2 sisters and Sally is one of them, the other sister must be ( S ). This means that Sally and ( S ) are the only two sisters.

Thus, Sally has 1 sister.

The answer is (\boxed{1}).

Let
• S = number of sisters in the family (girls)
• B = number of brothers in the family (boys)

Given

1. Sally has 3 brothers ⇒ B = 3.
2. Each brother has 2 sisters ⇒ every boy sees exactly 2 girls in the sibling group.
   Therefore S = 2.

Since Sally herself is one of those 2 sisters, the number of sisters Sally has (other than herself) is

2 – 1 = 1.

Sally has 1 sister.

Let's break down the problem:

• Sally is a girl.
• Sally has 3 brothers.
• Each brother has 2 sisters.

Let's analyze:

Sally's siblings:

• 3 brothers (let's call them B1, B2, B3)
• Sally herself

The brothers' sisters:

• Each brother has 2 sisters.

Who are the possible sisters for each brother?

• Sally is a sister to each brother.
• Are there any other sisters? That's the question!

If Sally is the only girl, then each brother would only have 1 sister (Sally). But the problem says each brother has 2 sisters.

Therefore, there must be another sister besides Sally.

Let's check: Suppose Sally has 1 sister (besides herself). So the siblings are:

• Sally (girl)
• A second sister (let's call her Anna)
• 3 brothers

Children in the family:

• 2 girls (Sally and Anna)
• 3 boys (the brothers)

Now, for each brother:

• Their sisters are Sally and Anna: 2 sisters (matches the problem statement).

So, Sally has 1 sister.

Final answer:

[ oxed{1} ]

Sally has 1 sister.

Let's break this down step by step:

• Sally has 3 brothers.
• Each brother has 2 sisters.

Now, the key is to realize that all the brothers share the same siblings.

So, when it says each brother has 2 sisters, those sisters are the same for all brothers.

Sally is one of those sisters. So who is the other sister?

Since each brother has 2 sisters, and Sally is one, there must be one more sister.

Therefore, Sally has 1 sister.

(Note: From Sally’s perspective, she has 3 brothers and 1 sister — the other girl.)

✅ Answer: Sally has 1 sister.

To determine how many sisters Sally has, let's analyze the family structure step by step.

---

Step 1: Understand the Given Information

• Sally is a girl.
• She has 3 brothers.
  → This means there are 3 boys in the family (excluding Sally).
• Each brother has 2 sisters.

---

Step 2: Analyze the Brothers' Perspective

Each of Sally’s 3 brothers has 2 sisters. Since Sally is one of those sisters (she's a girl), that implies:

• There must be one more sister besides Sally.
• So, the total number of girls in the family = Sally + 1 other girl = 2 girls.

---

Step 3: Determine How Many Sisters Sally Has

• Sally is one of the two girls in the family.
• Therefore, she has 1 sister (the other girl).

---

Final Answer

$$ \boxed{1} $$

Let's break it down:

• Sally is a girl.
• She has 3 brothers.
• Each of her brothers has 2 sisters.

Now, think about the brothers' perspective:
Each brother is a sibling to Sally and shares the same siblings.

So, when it says each brother has 2 sisters, those are the girls in the family. Since Sally is one girl, and there are 2 sisters in total from the brothers' point of view, that means there must be one other girl besides Sally.

Therefore, Sally has 1 sister.

Answer: 1 sister ✅

Sally is a girl with 3 brothers, meaning there are 3 male siblings in the family.
Each brother has 2 sisters, which refers to the total number of female siblings from the perspective of any brother.
Since Sally is one of these sisters, there must be one additional sister.
Therefore, there are 2 girls in total: Sally and one other sister.

From Sally's perspective, the number of sisters she has is the total number of female siblings minus herself.
With 2 girls in total, Sally has (2 - 1 = 1) sister.

This can be verified by considering the family composition:

• Girls: Sally and one other sister (e.g., Betty).
• Boys: 3 brothers (e.g., Brother1, Brother2, Brother3).
  Sally has 3 brothers, and each brother has 2 sisters (Sally and Betty).
  Thus, Sally has 1 sister.

\boxed{1}

Let's break it down:

• Sally is a girl.
• She has 3 brothers.
• Each brother has 2 sisters.

Now, since Sally is a girl and she has 3 brothers, those brothers are sharing the same siblings.

The key point: Each brother has 2 sisters.

Since Sally is one of the sisters, and each brother has 2 sisters, that means there must be one other sister besides Sally.

So, total sisters = Sally + 1 other sister = 2 sisters.

Therefore, Sally has 1 sister.

Final Answer: 1 sister ✅

To determine how many sisters Sally has, let's carefully analyze the information provided:

---

Step 1: Understand the family structure

• Sally is a girl.
• She has 3 brothers.
• Each brother has 2 sisters.

This means that from the perspective of each brother, there are 2 female siblings in the family — which includes Sally and one more sister.

---

Step 2: Determine the total number of girls in the family

Since each brother has 2 sisters, and Sally is one of them, the other sister must be another girl in the family.

Thus, the family has 2 girls in total:

• Sally
• One other sister

---

Step 3: Determine how many sisters Sally has

Sally is one of the two girls. Therefore, she has 1 sister (the other girl).

---

Final Answer

$$ \boxed{1} $$

I need to work through this step-by-step.

Given information:

• Sally has 3 brothers
• Each brother has 2 sisters

Let me think about this carefully:

Since Sally is a girl, she is one of the sisters that each brother has.

If each brother has 2 sisters, and Sally is one of those sisters, then there must be 1 additional sister besides Sally.

Therefore, Sally has 1 sister.

To verify:

• Sally + 1 sister = 2 sisters total
• Each of the 3 brothers has these same 2 sisters
• This matches the given information that each brother has 2 sisters

Sally has 1 sister.

Let me work through this step by step.

Given information:

• Sally has 3 brothers
• Each brother has 2 sisters

Let me think about who the sisters are:

• Sally is one sister
• Since each of the 3 brothers has 2 sisters, and Sally is one of them, there must be 1 other sister

So the two sisters are:

1. Sally
2. One other sister (who is also a sister to all 3 brothers)

Therefore, Sally has 1 sister.

Sally has 1 sister.

Let's break it down carefully.

• Sally is a girl.
• She has 3 brothers.

Now, consider the statement: "Each brother has 2 sisters."

Who are the sisters of Sally’s brothers?

The brothers share the same siblings — the same family. So Sally and her sisters are the sisters of each brother.

We know Sally is one sister. Let the number of other sisters (besides Sally) be $ x $. So total sisters = $ 1 + x $.

Each brother has 2 sisters, so:

$$ 1 + x = 2 \Rightarrow x = 1 $$

So there is 1 other sister besides Sally.

Therefore, Sally has 1 sister (besides herself), meaning 2 sisters total — but wait — when we say "how many sisters does Sally have?", we don’t count herself. So:

• Total girls in the family: Sally + 1 other = 2 girls
• So Sally has 1 sister.

✅ Let’s verify:

• Sally: 1 sister (the other girl), 3 brothers ✔️
• Each brother: 2 sisters (Sally + the other girl), 2 brothers (the other 2 brothers) ✔️

Yes, consistent.

---

Answer: Sally has 1 sister.

I need to figure out how many sisters Sally has.

Let me break this down step by step:

• Sally has 3 brothers
• Each brother has 2 sisters

Since Sally is one of the girls in the family, and each brother has 2 sisters, this means there are 2 sisters total that the brothers count.

One of those sisters is Sally herself, so there must be 1 additional sister.

Therefore, Sally has 1 sister.

To verify: Sally + 1 sister = 2 sisters total, and each of the 3 brothers correctly has 2 sisters (Sally and her sister).

Let’s break it down step by step.

We’re told:

Sally (a girl) has 3 brothers.

So, there are 3 boys in the family, and Sally is a girl — so at least one girl.

Each brother has 2 sisters.

That means, from the perspective of each of the 3 brothers, there are 2 sisters.

Who are those sisters?

Well, Sally is definitely one of them.

Since each brother has 2 sisters, there must be one more girl besides Sally.

So, the sisters are: Sally and one other girl.

Therefore, Sally has 1 sister.

---

✅ Final Answer: 1 sister

(Sally + 1 other girl = 2 sisters total, which matches what each brother sees.)

We are told:

• Sally has 3 brothers.
• Each brother has 2 sisters.

We need to find: How many sisters does Sally have?

---

Let’s think carefully.

Sally is a girl, and she has 3 brothers. So the family has at least Sally + 3 brothers = 4 children so far.

Now, each brother has 2 sisters.

Who are those 2 sisters?

One of them is Sally. The other must be another girl — because if each brother has only 2 sisters, and Sally is one, then there must be one more sister.

So total sisters = Sally + 1 other girl = 2 sisters.

Therefore, Sally has 1 sister.

Wait — let’s check this again.

If there are 2 sisters total in the family, and Sally is one of them, then she has 1 sister.

And each brother has 2 sisters: Sally and the other girl. That matches.

So:

• Total children: Sally, 1 other sister, and 3 brothers → 5 children.
• Each brother has 2 sisters → correct.
• Sally has 1 sister.

✅ So the answer is: 1 sister.

---

Answer: Sally has 1 sister.

To solve this problem, let's carefully analyze the relationships described.

---

Step 1: Understand Sally's Perspective

• Sally is a girl.
• She has 3 brothers.
• So, from her point of view, there are 3 male siblings and herself as a female sibling.

---

Step 2: Analyze the Brothers’ Perspective

• The problem states: "Each brother has 2 sisters."
• This means that each of Sally’s brothers sees 2 girls in the family as their sisters.
• Since all the brothers share the same family, the set of sisters they see is the same for all of them.

So, if each brother has 2 sisters, then there are 2 girls in total in the family.

---

Step 3: Determine How Many Sisters Sally Has

• Sally is one of those 2 girls.
• Therefore, the other girl is her only sister.
• When we ask "How many sisters does Sally have?", we are not counting herself — we're only counting the other female siblings.

---

Final Answer

$$ \boxed{1} $$

Here is the step-by-step logical deduction:

1. Analyze the family structure from the brothers' perspective: The problem states that "Each brother has 2 sisters." Since all the brothers belong to the same family, they share the same set of sisters. This means there are exactly 2 girls in the entire sibling group.

2. Identify the girls: We know one of the girls is Sally. Since the total number of girls is 2, the other girl must be Sally's sister.

3. Calculate Sally's specific number of sisters: To find out how many sisters Sally has, we look at the total number of girls and subtract Sally herself. $$ \text{Total Girls} - \text{Sally} = \text{Sally's Sisters} $$ $$ 2 - 1 = 1 $$

Conclusion: Sally has 1 sister.

1. Participants and Their Relationships:

• Sally is a girl with 3 brothers, so there are 3 boys in the family.
• Each brother (being male) has 2 sisters.

2. Determine the Number of Girls:

• Every brother's sisters are the female siblings in the family.
• Since each brother has 2 sisters, there must be 2 girls in total.

3. Calculate Sally's Sisters:

• Since Sally is one of the 2 girls, her only sister is the other girl in the family.
• Therefore, Sally has 1 sister.

Answer: Sally has \boxed{1} sister.

Sally has 1 sister.

Here's the breakdown:

• Sally has 3 brothers.
• Each brother has 2 sisters total (Sally + 1 other sister).
• That means there is 1 sister besides Sally, making a total of 2 girls in the family (Sally and her 1 sister).
• So, Sally herself has 1 sister.

Family totals: 2 sisters + 3 brothers = 5 children. Each brother sees both sisters, which fits perfectly.

Answer: Sally has 1 sister.

Explanation

1. Sally is a girl, and she has three brothers.
2. Each brother has exactly two sisters.
3. For a brother, the two sisters are the other girls in the family.

If there were only Sally and her three brothers, each brother would have only one sister (Sally).
Since each brother is said to have two sisters, there must be one more girl besides Sally.

That extra girl is also a sister to Sally (they are siblings), so Sally’s sister count is:

• The extra girl (1)

Hence Sally has one sister. (The total number of girls in the family is 2, Sally plus her one sister.)

Solution

Let’s break down the family structure:

• Sally is a girl.
• She has 3 brothers.
• Each brother has 2 sisters.

Since Sally is already a girl, she counts as one sister. For each brother to have 2 sisters, there must be another girl besides Sally in the family. If there were more than 2 sisters, each brother would have more than 2 sisters.

Calculation

• Sally herself (1 sister)
• One other sister (the second sister)

So, Sally has 1 sister.

Final Answer

Sally has 1 sister.

1

Explanation

The reasoning starts by establishing the family structure based on the given information. Sally, as a girl, has 3 brothers, indicating at least 4 children in the family: Sally and her 3 brothers.

Next, the statement that each brother has 2 sisters is analyzed. Since Sally is one sister to each brother, an additional sister is required to account for the second sister per brother.

This leads to a total of 5 children: Sally, 1 other sister, and 3 brothers. In this configuration, each brother has exactly 2 sisters (Sally and the other sister).

From Sally's viewpoint, she has 3 brothers and shares the family with 1 other sister, confirming she has 1 sister. This structure satisfies all conditions without requiring additional siblings.

If there are 3 brothers and each of them has 2 sisters, then the total number of sisters in the family must be 2—because they all share the same sisters. Since Sally is a girl in the family, she is one of those sisters. That means there is exactly one other sister besides her.

So, Sally has 1 sister.