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 s trength

Answer 1

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Let the no. of girls be 5x
No. of boys=7x
According to the question
5x+8=7x
7x-5x=8
2x=8
x=8/2
x=4
No. of girls=5*4=20
no. of boys=7*4 or 5*4+8=28
Hence the total strength of the class is 20+28=48

Answer 2

Let no if boys is 7x
And no of girls is 5x
ATQ
7x=8+5x
7x-5x=8
2x=8
x=4
No of boys =7×4=28
No of girls=5×4=20