Question

In a class of $35$ students, the number of girls is two-fifth of the number of boys. Find the number of boys in the class.

Answer 1

Let number of boys be $x$

$\therefore x+\frac{2x}{5}=35\dots \dots .$ Given

$\therefore \frac{7x}{5}=35$

$X=5\times 5=25$

Number of boys $=25$