Question

The ratio of boys to girls in a classroom is 2 : 3. If there are
20 children in total, how many boys are there?

Answer 1

Answer:

8

Step-by-step explanation:

let the ratio constant be 'x'

=> 2x:3x

sum = 2x + 3x = 5x

Total number of boys

=>(2x/5x)20 = 8

Answer 2

Question -:

The ratio of boys and girls in a classroom is 2 : 3 respectively. If the total number of children is 20. How many boys are there in the class ?

Explanation -:

In this question we are provided with the ratio of boys isto girls that is 2 : 3 it is also given that total number of children are 20. We are asked to calculate number of boys.

$\green{ \small \pmb{\tt{ First \: we \: will \: form \: an \: equation }}}$

Let us assume the number of girls as 3x and number of boys as 2x.

Total number of children = 20

3x + 2x = 20

$\orange{\small \pmb{\tt{ Now \: we \: will \: solve \: this \: equation }}}$

$\small\frak{ 3x + 2x = 20}$

$\small\frak{ 5x = 20}$

$\small\frak{ x = \dfrac{20}{5} = 4}$

$\small \underline{ \boxed{\pmb{x = 4} }} \large \: \star$

Boys = 2 × 4 = 8

Girls = 3 × 4 = 12

• Hence 8 boys and 12 girls are there in the classroom.

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