Question

A sum of money was equally distributed among some girls. Had there been 5 girls more each would have received Rs.15 less. Had there been 5 girls less than each would have received Rs. 45 more.Find the number of girls.

Answer 1

Step-by-step explanation:

Let the sum of rupee be x

 no of boys be y

then each boy get x/y

now if the no of boys increased by 10 each boy get x/(y+10) = (x/y)-1 => x/(y+10) = (x-y)/y .........(1)

now case 2nd if no of boys decrease by 15 each boy get x/(y-15)= (x/y) +3 => x/(y-15) = (x+3y)/y ...........(2)