Number of boys 20% more than girls, total 88. Number of boys: MCQ with Answer and Explanation

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Number of boys 20% more than girls, total 88. Number of boys:

A. 44

B. 52

C. 48

D. 40

Answer: Option C

Solution (By JKSSB Mock Tests)

Girls = x, boys = 1.2x, total 2.2x=88 → x=40, boys=48.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

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A number is erroneously multiplied by 5/3 instead of 3/5. Percentage error in calculation:

A. 180%

B. 166.67%

C. 177.78%

D. 150%

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Correct Answer: Option C

Explanation:
Correct = (3/5)x, wrong = (5/3)x. % error = [(5/3 - 3/5)/(3/5)]×100 = (16/9)×100 ≈ 177.78%.

This question belongs to: Maths Percentage

Question #2

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A student scored 20% marks and failed by 36 marks. Another student scored 30% marks and got 24 marks more than the passing marks. Find the passing marks.

A. 180

B. 160

C. 140

D. 156

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Correct Answer: Option D

Explanation:
0.2M + 36 = 0.3M - 24 → 0.1M = 60 → M = 600. Passing marks = 0.2×600+36 = 156.

This question belongs to: Maths Percentage

Question #3

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The price of a commodity is increased by x% then decreased by x%. Net decrease is 4%. Find x.

A. 25

B. 20

C. 15

D. 10

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Correct Answer: Option B

Explanation:
(1+x/100)(1-x/100) = 0.96 → 1 - x²/10000 = 0.96 → x² = 400 → x = 20.

This question belongs to: Maths Percentage

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