Question

While dividing students in two different section it was found that in a particular section the ratio of number of boys and to girls was 7:5 is the present strength of the class is 48 students find the number of boys and girls in the class find how many moregirls should be added so that the number of boys is equal to the number of girls what is the purpose of doing so?

Answer 1

8 must be added to the no. of girl that is equal to the number of boys.

Answer 2

let boys be x and girls be y

so x+y=48 equation 1

and x:y: :7:5so x/y=7/5

so x=7y/5 equation 2

frm eq1 and 2 we get
.7/5y+y=48


simplifying y=20 and so x =28