Question

In a class $\frac{3}{5}$${}^{th}$ of the students are girls. If there are 20 boys in the class, total how many students are there?

• A. 30
• B. 40
• C. 50
• D. 60

Answer 1

The correct option is C 50

Let us represent the fraction of girls in the class visually, where girls are represented by green blocks.
Remaining blocks = 2
So, the number of boys in the class can be represented by 2 blocks, as the number of boys are 20.
It means 2 blocks are equivalent to 20 students.
Therefore, each block is equivalent to 20 $÷$ 2 = 10 students
Total number of students are represented by 5 blocks.
hence, the total number of students
= 10 $\times$ 5 = 50.