Question

In the classroom, 40% of the class are boys. The number of girls is 24. What is the strength of the class?

• A. 30
• B. 50
• C. 40
• D. 33

Answer 1

The correct option is C 40

Let the strength of the class be $x$
Given that $40\%$ are boys.
So, number of boys is $\frac{40}{100}\times x=0.4x$
$\Rightarrow$ Number of girls $=x-0.4x=0.6x$
$\Rightarrow 0.6x=24$
$\Rightarrow x=\frac{24}{0.6}=40$