Question

The number of boys and girls in a class are in the ratio 7:5. The number of boys is 8 more than the number of girls. What is the total class strength?
plz ans this question fast its argent

Answer 1

Answer:

48

Step-by-step explanation:

ratio of boy:girl is 7:5 which means

b/g = 7/5

let b be the number of boys

let g be the number of girls

b = 8 more than girls = g+8

b = g + 8

now you can substitute b in the first equation

( g + 10) / g = 7/5

solve for 'g'

5( g + 8 ) = 7g

5g + 40 = 7g

40 = 2g

g =20, number of girls = 20

now find b,

b = g + 8

b = 20 + 8

b = 28, number of boys= 28

class strength = 28 + 20 = 48