Student A gets 25% marks and fails by 20 marks. Student B gets 40% marks and passes by 40 marks. Find the total marks. MCQ with Answer and Explanation

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Student A gets 25% marks and fails by 20 marks. Student B gets 40% marks and passes by 40 marks. Find the total marks.

A. 400

B. 300

C. 600

D. 500

Answer: Option A

Solution (By JKSSB Mock Tests)

Difference in percentage = 40% - 25% = 15%. Difference in marks = 40 + 20 = 60. 15% of Total = 60. Total = 400.

This question belongs to: Maths Percentage

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Question #1

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If the length of a rectangle is increased by 20%, by what percentage must the width be decreased to maintain the same area?

A. 20%

B. 30%

C. 16.67%

D. 25%

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Correct Answer: Option C

Explanation:
Required decrease = (20 / 120) * 100 = 16.67%.

This question belongs to: Maths Percentage

Question #2

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

A. No change

B. 2% decrease

C. 10% decrease

D. 2% increase

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Correct Answer: Option B

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

This question belongs to: Maths Percentage

Question #3

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If the numerator of a fraction is increased by 50% and the denominator is decreased by 25%, it becomes 5/8. Find the original fraction.

A. 3/8

B. 5/12

C. 7/16

D. 5/16

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Correct Answer: Option D

Explanation:
(1.5N)/(0.75D) = 2N/D = 5/8 → N/D = 5/16.

This question belongs to: Maths Percentage

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