Library: 20% English, 30% Hindi, remaining 5000 other. Total books: MCQ with Answer and Explanation

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Library: 20% English, 30% Hindi, remaining 5000 other. Total books:

A. 8000

B. 15000

C. 12000

D. 10000

Answer: Option D

Solution (By JKSSB Mock Tests)

50% = 5000, total = 10000.

This question belongs to: Maths Percentage

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Question #1

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The price of an article is reduced by 20% and then increased by 30%. Find the net change in the price.

A. 10% increase

B. No change

C. 4% decrease

D. 4% increase

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Correct Answer: Option D

Explanation:
0.8 × 1.3 = 1.04, 4% increase.

This question belongs to: Maths Percentage

Question #2

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Computer price reduced 20%, sale increased 80%. Net effect on revenue:

A. 36% increase

B. 24% increase

C. 44% increase

D. 56% increase

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Correct Answer: Option C

Explanation:
New revenue = 0.8×1.8 = 1.44, increase 44%.

This question belongs to: Maths Percentage

Question #3

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A number increased by 30% then decreased by 30% results in net change of:

A. 0%

B. 9% decrease

C. 9% increase

D. 6% decrease

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Correct Answer: Option B

Explanation:
1.3 × 0.7 = 0.91, 9% decrease.

This question belongs to: Maths Percentage

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