Question

In a school, $\frac{5}{8}$ of the students are boys. If there are 240 girls, find the number of boys in the school.

Answer 1

The total number of students = 1

and no, of boys = $\frac{5}{8}$

$\therefore No.ofgirls=1-\frac{5}{8}$

$=\frac{8-5}{8}=\frac{3}{8}$

$\therefore \text{If girls are}\frac{3}{8},\text{Then boys}=\frac{5}{8}\text{and if girls are 1, Then boys}=\frac{5}{8}÷\frac{3}{8}=\frac{5}{8}\times \frac{8}{3}=\frac{5}{3}$

and if girls are 240, Then boys = $\frac{5}{3}\times 240$

$=\frac{1200}{3}=400Ans.$