Question

In a class, 60% of the students are girls and there are 20 boys. What is the total number of students in the class?

• A. 35
• B. 30
• C. 40
• D. 50

Answer 1

The correct option is D

50

Let the total number of students in the class be $x$.

Given that 60% are girls, so 40% are boys.

Since number of boys in the class is 20,
40% $\times$ $x$ = 20
$\Rightarrow \frac{40}{100}\times x=20$
$\Rightarrow x=\frac{20\times 100}{40}$
$\Rightarrow x=50$

Therefore, the total number of students in the class is 50.