15% of a number is 45. 50% of that number is: MCQ with Answer and Explanation

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15% of a number is 45. 50% of that number is:

A. 120

B. 140

C. 150

D. 130

Answer: Option C

Solution (By JKExamLibrary)

Number = 45/0.15 = 300; 50% of 300 = 150.

This question belongs to: Maths Percentage

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Question #1

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A student scored 60% marks, which is 60 marks more than the pass marks. If the pass marks is 40%, find the maximum marks.

A. 350

B. 300

C. 250

D. 400

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Correct Answer: Option B

Explanation:
Difference in percentage = 60% - 40% = 20%. 20% of Maximum = 60 marks. Maximum = 60 * 5 = 300.

This question belongs to: Maths Percentage

Question #2

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A shopkeeper sells an article at 20% profit. If bought at 20% less and sold for Rs. 10 less, gain would be 25%. Find CP.

A. Rs. 45

B. Rs. 50

C. Rs. 55

D. Rs. 40

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Correct Answer: Option B

Explanation:
CP = x, SP = 1.2x. New CP = 0.8x, new SP = 1.2x - 10. New SP = 1.25×0.8x = x. So 1.2x - 10 = x → 0.2x = 10 → x = 50.

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Question #3

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A number is increased by 10% and then decreased by 10%. If the resulting number is 1188, what was the original number?

A. 1150

B. 1250

C. 1100

D. 1200

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Correct Answer: Option D

Explanation:
1.1 × 0.9 = 0.99, 0.99x = 1188 → x = 1200.

This question belongs to: Maths Percentage

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