Question

In a class of $50$ students, $40\%$ are girls. Find the number of girls and number of boys in the class?

• A. $20$
• B. $30$
• C. $40$
• D. $10$

Answer 1

The correct option is B $30$

In a class there are $50$ students.

Number of girls in the class $=40\%$ of $50=\frac{40}{100}\times 50=\frac{2000}{100}=20$
Number of boys in the class $=\text{Total number of students in the class - Number of girls}=50-20=30$.