Question

The ratio of boys and girls in
in the
school is 4:5. If the number of
boys is 320, how many children
are there in the school?​

Answer 1

Answer:

720

Step-by-step explanation:

let the no. of boys and girls be 4x and 5x

4x=320

x=320/4

x=80

no. of girls=5*80=400

total no. of children=320+400=720

Answer 2

Answer:

• There are 720 children in the school.

Step-by-step explanation:

Given that:

• The ratio of boys and girls in the school is 4 : 5.
• The number of boys is 320.

To Find:

• How many children are there in the school?

Let us assume:

• The number of girls be x.

Finding the number of girls:

According to the question.

⟿ 4 : 5 = 320 : x

⟿ 4/5 = 320/x

Cross multiplication.

⟿ 4x = 320 × 5

⟿ x = 1600/4

⟿ x = 400

∴ Number of girls = 400

Finding the number of children in the school:

• Number of children = Boys + Girls
• Number of children = 320 + 400
• Number of children = 720

∴ Number of children in the school = 720