Price of a commodity falls by 15%. To keep expenditure constant, consumption must increase by: MCQ with Answer and Explanation

Question

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Price of a commodity falls by 15%. To keep expenditure constant, consumption must increase by:

A. 18%

B. 17.64%

C. 20%

D. 15%

Answer: Option B

Solution (By JKSSB Mock Tests)

New price 0.85, consumption multiplier needed = 1/0.85 ≈ 1.17647, increase 17.64%.

This question belongs to: Maths Percentage

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Question #1

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In an exam, 70% passed English, 65% Maths, 27% failed both, 248 passed both. Total students:

A. 400

B. 380

C. 360

D. 420

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Correct Answer: Option A

Explanation:
Failed English=30%, Failed Maths=35%. Failed both=27%. Passed both = 100 - (30+35-27) = 62%. 62% = 248 → total = 400.

This question belongs to: Maths Percentage

Question #2

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A population increases by 5% yearly. Its present population is 88,200. What was it 2 years ago?

A. 80000

B. 78000

C. 82000

D. 84000

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Correct Answer: Option A

Explanation:
P_past = 88200 / (1.05)^2 = 88200 / 1.1025 = 80000.

This question belongs to: Maths Percentage

Question #3

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33 1/3 % of 240 is:

A. 80

B. 60

C. 70

D. 90

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Correct Answer: Option A

Explanation:
33 1/3% = 1/3, (1/3)×240 = 80.

This question belongs to: Maths Percentage

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