Question

In school 5/8 of the students are boys .if there are240 girls ,find the number of boys in the school

Answer 1

Heya user,
Here is your answer :D

Let the number of students be x,
then number of boys - $\frac{5x}{8}$

Number of girls = 240
ATQ - 
Total students - Number of boys = Number of girls
x - $\frac{5x}{8}$ = 240
$\frac{3x}{8}$ = 240
x = 640
Total number of students are 640

Then number of boys are $\frac{5x}{8}$*640 = 400
So there are 400 boys in the school.

Hope it helps. :D