25% of A = 40% of B = 1/5 of C. Find A:B:C. MCQ with Answer and Explanation

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25% of A = 40% of B = 1/5 of C. Find A:B:C.

A. 8:10:5

B. 5:8:10

C. 10:8:5

D. 8:5:10

Answer: Option D

Solution (By JKSSB Mock Tests)

Let 0.25A = 0.4B = 0.2C = k. Then A=4k, B=2.5k, C=5k. Multiply by 2: A:B:C = 8:5:10.

This question belongs to: Maths Percentage

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Kerosene price up 20%. To keep expenditure same, reduce consumption by:

A. 20%

B. 18%

C. 16.67%

D. 15%

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Correct Answer: Option C

Explanation:
Reduction = (20/120)×100 = 16.67%.

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Question #2

A mixture contains 25% alcohol. In 80 litres, amount of alcohol is:

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Correct Answer: Option A

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Question #3

Candidate got 35% of valid votes and lost by 2100. 20% votes invalid. Total voters:

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Correct Answer: Option B

Explanation:
Valid votes V, winner 65%V, loser 35%V, margin 30%V=2100 → V=7000. Total T, 0.8T=7000 → T=8750.

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