Question

$70\%$ of students in a school are boys. If the number of girls is is $240$. How many boys are there in the school ?

Answer 1

Given,

70% of students are boys.

Then, 30% of students are girls

(Because the total will be 100%)

We know that, the number of girls us 240.

Let the total number of students be x.

Then, 30% of x=504

So, $\frac{30}{10}$

so, $x=\frac{504.100}{30}$

$x=1680$

Then, the number of boys is 168000-1176

$\therefore$ There are 11760 boys in the school.