# How many boys and girls in a school hall

• MHB
• Johnx1
In summary, the number of boys and girls in a school hall can be determined by taking a headcount or conducting a survey. It is not always equal, as it can vary based on demographics and events. Factors such as enrollment and schedules can affect the number, and it can change throughout the day. Knowing this information is important for event planning and creating a safe and comfortable environment for students.
Johnx1
There was an equal number of boys and girls in a school hall. After 108 boys left the hall, the number of girls in the hall became 4 times the number of boys in the hall. How many pupils were there in the hall at first?

my work:

Number of Boys = B
Number of Girls = G
G = B

We know that the number of girls was 4 times more after 108 boys left.

For boys:
-------------------------------------------------------
G = 4(b-108).
And since we know G = B

B = 4(B - 108)
B = 144.
------------------------------------------------------

For girls
-----------------------------------------------------
Then I plugged it back in G = 4(B - 108)

so, G = 4(144 - 108)
G = 4(36) = 144.
---------------------------------------------------

Total number of students is 144 + 144 = 288.

Johnx said:
There was an equal number of boys and girls in a school hall. After 108 boys left the hall, the number of girls in the hall became 4 times the number of boys in the hall. How many pupils were there in the hall at first?
Correct! Good job...

Can be done quicker since B = G.
B - 108 = B / 4
4B - 432 = B
3B = 432
B = 144 : so 2B = 288

## 1. How do you determine the number of boys and girls in a school hall?

The number of boys and girls in a school hall can be determined by taking a headcount or conducting a survey where students report their gender.

## 2. Is the number of boys and girls in a school hall usually equal?

It is not always guaranteed that the number of boys and girls in a school hall will be equal. It can vary depending on the school's demographics and the specific event taking place in the hall.

## 3. What factors can affect the number of boys and girls in a school hall?

Factors such as school enrollment, class schedules, extracurricular activities, and gender-specific events can affect the number of boys and girls in a school hall at any given time.

## 4. Can the number of boys and girls in a school hall change throughout the day?

Yes, the number of boys and girls in a school hall can change throughout the day as students come and go for classes and activities.

## 5. Why is it important to know the number of boys and girls in a school hall?

Knowing the number of boys and girls in a school hall can help with event planning, resource allocation, and ensuring a safe and comfortable environment for all students.

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