If the price of oil decreases by 25%, by what percentage can consumption be increased to maintain the same expenditure? MCQ with Answer and Explanation

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If the price of oil decreases by 25%, by what percentage can consumption be increased to maintain the same expenditure?

A. 30%

B. 33.33%

C. 20%

D. 25%

Answer: Option B

Solution (By JKSSB Mock Tests)

Required increase = (25 / 75) * 100 = 100 / 3 = 33.33%.

This question belongs to: Maths Percentage

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Question #1

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If a number increased by 25% is 150, what is the original number?

A. 110

B. 120

C. 100

D. 130

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Correct Answer: Option B

Explanation:
Let the number be x. x * 1.25 = 150. x = 150 / 1.25 = 120.

This question belongs to: Maths Percentage

Question #2

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If 20% of a number is 45, what is the number?

A. 200

B. 250

C. 225

D. 300

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Correct Answer: Option C

Explanation:
Let the number be x. (20 / 100) * x = 45 implies x = 45 * 5 = 225.

This question belongs to: Maths Percentage

Question #3

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If 20% of (A+B) = 50% of (A-B), then A:B is:

A. 7:3

B. 5:3

C. 3:7

D. 3:5

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Correct Answer: Option A

Explanation:
0.2(A+B)=0.5(A-B) → 2(A+B)=5(A-B) → 2A+2B=5A-5B → 7B=3A → A/B=7/3.

This question belongs to: Maths Percentage

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