Question

10. The numberthe number of boys and girls in a class are the ratio 7 is to 5 the number of boys is 8 more than the number of girls what is the total class strength ​

Answer 1

7x-5x=8

2x=8

x=4

Boys=4*7=28

Girls=4*5=20

Total=28+20=48

Answer 2

☛ Question :-

The number of boys and girls in a class are the ratio 7 : 5. The number of boys is 8 more than the number of girls. What is the total class strength.

☛ Given :-

• The number of boys and girls in a class are the ratio 7 : 5
• The number of boys is 8 more than the number of girls.

☛ To Find :-

• The strength of the class.

☛ Solution :-

• Let number of boys = 7x
• And number of girls = 5x

Equation :- 7x = 5x + 8

⇒ 7x - 5x = 5x + 8 - 5x

⇒ 2x = 8

⇒ 2x/2 = 8/2

⇒ x = 4

Now,

7x = 4 × 7 = 28

5x = 5 × 4 = 20

• Number of boys = 28
• Number of girls = 20

➞ 28 + 20

➞ 48

∴ Total strength of class = 48 members