Price of pen up 15%. By what % reduce consumption so that expenditure rises only 5%? MCQ with Answer and Explanation

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Price of pen up 15%. By what % reduce consumption so that expenditure rises only 5%?

A. 10%

B. 9.09%

C. 8.7%

D. 8%

Answer: Option C

Solution (By JKSSB Mock Tests)

1.15 × x = 1.05 → x = 1.05/1.15 ≈ 0.91304, reduction = 8.7%.

This question belongs to: Maths Percentage

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Question #1

80 increased by 15% is:

A. 95

B. 98

C. 92

D. 90

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Correct Answer: Option C

Explanation:
80 × 1.15 = 92.

This question belongs to: Maths Percentage

Question #2

A train 200 m long passes a platform 300 m long in 25 seconds. Find the speed of the train in kmph.

A. 72 kmph

B. 54 kmph

C. 60 kmph

D. 66 kmph

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Correct Answer: Option A

Explanation:
Total distance = 200+300=500 m, time 25 sec, speed = 500/25 = 20 m/s = 20 × 18/5 = 72 kmph.

This question belongs to: Maths Percentage

Question #3

In an election, 25% of the votes were invalid. The winner got 56% of the valid votes and defeated the other candidate by 1800 votes. What was the total number of votes?

A. 15000

B. 18000

C. 22000

D. 20000

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Correct Answer: Option D

Explanation:
Valid votes V = 0.75T. Winner = 0.56V, loser = 0.44V, margin = 0.12V = 1800 → V=15000 → T=20000.

This question belongs to: Maths Percentage

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