Question

There are 36 pupils in a class.the number of boys is twice the number of girls.how many are girls?

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Answer 1

12 girls

Explanation:

Boys to girls ratio= 1:2

Thats means there are (1+2) 3 total parts.

So
`(36)/(3)`=12

Each part is 12 so

boys is 12*2= 24 boys

Girls id 12*1= 12 girls

Answer 2

12

Explanation:

Total number of students in class ⇒ 36

Given that,

The number of boys is twice the number of girls.

First, let us make an expression to find the number of girls.

For that, let the number of girls be x.

Number of girls ⇒ x

Number of boys ⇒ 2x

Total number of pupils ⇒ x + 2x

So,

x + 2x = 36

3x = 36

Divide both sides by 3.

x = 12

Therefore, there are 12 girls and 24 boys in the class.