Question

In a class $25$% of the total students are absent. If $45$ students are presents, then what is the total strength of the class.

Answer 1

Let total strength of class be x

no of students present =

no. of student absent = $\frac{25x}{100}$

then

$x=45+\frac{25x}{100}$

$75x=4500$

$x=\frac{4500}{75}=60$

$\therefore$ total strength of class is 60