Question

if 70 percent of the student in a school are boy and the number of girls is 540 find the number of boys in the school?

Answer 1

70% are boys, then 30% are girls.

Let total students be x.
Then, 30% of x is 540
or 3x/10 is 540
so
x is 1800.

Now, no. of boys = total students - no. of girls
= 1800 - 540 = 1260