In a class of 50 students, 60% are boys. Number of girls is: MCQ with Answer and Explanation

In a class of 50 students, 60% are boys. Number of girls is:

A. 25

B. 20

C. 30

D. 35

Answer: Option B

Girls = 40% of 50 = 20.

This question belongs to: Maths Percentage

No comments yet. Be the first to start the discussion!

Question #1 Report Error

60% of a number is 30 less than 75% of the same number. The number is:

A. 240

B. 200

C. 150

D. 180

Correct Answer: Option B

Explanation:
0.75x - 0.6x = 30 → 0.15x = 30 → x = 200.

This question belongs to: Maths Percentage

Question #2 Report Error

175% of 80 is:

A. 140

B. 120

C. 130

D. 150

Correct Answer: Option A

Explanation:
1.75 × 80 = 140.

This question belongs to: Maths Percentage

Question #3 Report Error

Coal price up 25%, expenditure to rise only 10%. Reduce consumption by:

A. 15%

B. 10%

C. 18%

D. 12%

Correct Answer: Option D

Explanation:
1.25 × x = 1.1 → x = 0.88, reduction 12%.

This question belongs to: Maths Percentage