Question

If there are 20 girls in a class which constitute 40% of all the students in the class, then the total number of students in the class = .

• A. 40
• B. 60
• C. 100
• D. 50

Answer 1

The correct option is D 50

Let the total number of students in the class be $x$.
Given, 40% of all the students in the class = 20.
$\Rightarrow \frac{40}{100}\times x=20$
$\Rightarrow x=50$.