Question

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

Answer 1

Step-by-step explanation:

Let

Boys = B

Girls = G

Given

B = G + 8

Also

B : G = 7 : 5

Total number of students = x

B = 7x/12 & G = 5x/12

Or

G + 8 = 7x/12 [but G = 5x/12]

So, 5x/12 + 8 = 7x/12

Or, 7x/12 - 5x/12 = 8

= (7x - 5x)/12 = 8

= 2x/12 = 8

= 2x = 8 × 12

= 2x = 96

= x = 96/2 = 48

So total number of students = 48