Question

The numder of boys and girls in class are in a ratio 7:5 .The number of boys is 8 more than the no.Of girls .Find the total strenght of the class

Answer 1

Let the common factor be x

No. of boys=7x

no. of girls= 5x

According to the given conditions:

7x=5x+8

2x=8

x=4

Thus, total strength=12x=12×4=48

Answer 2

let the number of boys=7x

number of girls = 5x

7x-5x=8

2x=8

x=8/2

x=4

numberbof boys=7x

=7× 4

=28

number of girls= 5x

=5×4

=20

total strength = 28 + 20

= 48