Question

The ratio of boys to girls in a school is 3:5. If there are 240 girls, then number of boys in the school is

• A. 120
• B. 132
• C. 148
• D. 144

Hint:

Convert ratios into unit parts first, then multiply accordingly.

Answer 1

The Correct Option is D

Concept: Use ratio proportion method. Explanation: Boys : Girls = 3 : 5 Girls = 240 corresponds to 5 parts So, 1 part: \[ 240 \div 5 = 48 \] Boys = 3 parts: \[ 3 \times 48 = 144 \]