Question

The boys and the girls in a school are in the ratio 7:4. If total strength of the school be 660,

find the number of boys and girls.​

Answer 1

Answer:

no of boys= 420

no of girls=240

Step-by-step explanation:

7x+4x=660

11x=660

x=60

no of boys = 7(60)=420

no of girls= 4(60)=240

Answer 2

Answer :-

• Number of boys = 420
• Number of girls = 240

Given :-

• The boys and girls in a school are in ratio 7 : 4, the total strength of the school is 660.

To Find :-

• Number of boys and girls.

Solution :-

Put x in the ratio

• Number of boys = 7x
• Number of girls = 4x

Here

• Total strength of the school is 660.

According to question :-

⇒ 7x + 4x = 660

⇒ 11x = 660

⇒ x = 660/11

⇒ x = 60

Now

• Number of boys = 7x = 7 × 60 = 420
• Number of girls = 4x = 4 × 40 = 240

Hence, the number of boys and girls are 420 and 240 respectively.