In an examination, 70% passed in English, 65% in Maths and 15% failed in both subjects. If 300 students passed in both, total number of students was: MCQ with Answer and Explanation

Question

In an examination, 70% passed in English, 65% in Maths and 15% failed in both subjects. If 300 students passed in both, total number of students was:

A. 550

B. 600

C. 650

D. 500

Answer: Option B

Solution (By JKSSB Mock Tests)

Failed Eng=30%, Maths=35%. Passed both = 100 - (30+35-15) = 50%. 50% of total = 300 → total = 600.

This question belongs to: Maths Percentage

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Question #1

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Income Rs. 25000, spends 64%. Income rises 20%, savings to increase 50%. % increase in expenditure:

A. 5%

B. 3.125%

C. 4.167%

D. 6.25%

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Correct Answer: Option B

Explanation:
Initial: inc 25000, exp 16000, sav 9000. New inc 30000, sav 13500, exp 16500. Increase 500 on 16000 = 3.125%.

This question belongs to: Maths Percentage

Question #2

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72% passed an exam. Failures = 560. Total examinees:

A. 2500

B. 2000

C. 1800

D. 2200

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Correct Answer: Option B

Explanation:
28% = 560, total = 560/0.28 = 2000.

This question belongs to: Maths Percentage

Question #3

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Price reduced 30% then increased 40%. Net change:

A. 10% increase

B. 2% decrease

C. No change

D. 2% increase

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Correct Answer: Option B

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

This question belongs to: Maths Percentage

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