Question

In a school 4/5 of the students are boys and the number of girls is 100.fund the no boys

Answer 1

Let the no.of students be x
no.of girls= 100 (given)
no.of boys = 4x/5
4x/5+100= x
4x/5 - x =-100
(4x-5x)/5 =-100
-x= -100×5
-x=-500
x=500
no.of students=500
no.of boys=500-100=400