Price increased 12% then decreased 12%. Net change: MCQ with Answer and Explanation

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Price increased 12% then decreased 12%. Net change:

A. 1.44% increase

B. 1.44% decrease

C. 2.4% decrease

D. No change

Answer: Option B

Solution (By JKExamLibrary)

1.12×0.88 = 0.9856, 1.44% decrease.

This question belongs to: Maths Percentage

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Question #1

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The price of an article increases by 10%, and then again by 10%. What is the net percentage increase?

A. 20%

B. 22%

C. 21%

D. 25%

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Correct Answer: Option C

Explanation:
Successive percentage formula: a + b + (ab / 100). 10 + 10 + (10 * 10 / 100) = 20 + 1 = 21%.

This question belongs to: Maths Percentage

Question #2

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Number increased 40% then decreased 30%. Net change:

A. 2% increase

B. 10% decrease

C. 2% decrease

D. No change

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Correct Answer: Option C

Explanation:
1.4 × 0.7 = 0.98, 2% decrease.

This question belongs to: Maths Percentage

Question #3

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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. 156

B. 160

C. 180

D. 140

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Correct Answer: Option A

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

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