Income Rs. 20000, spends 60%. Income rises 25%, savings to increase 50%. % increase in expenditure: MCQ with Answer and Explanation

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Income Rs. 20000, spends 60%. Income rises 25%, savings to increase 50%. % increase in expenditure:

A. 8.33%

B. 6.25%

C. 12.5%

D. 10%

Answer: Option A

Solution (By JKSSB Mock Tests)

Initial: inc 20000, exp 12000, sav 8000. New inc 25000, sav 12000, exp 13000. Increase 1000 on 12000 = 8.33%.

This question belongs to: Maths Percentage

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Question #1

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A number is increased by 20% and then decreased by 25%. The result is 36 less than the original. Find the original number.

A. 360

B. 320

C. 400

D. 300

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Correct Answer: Option A

Explanation:
1.2 × 0.75 = 0.9. 0.9x = x - 36 → 0.1x = 36 → x = 360.

This question belongs to: Maths Percentage

Question #2

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If the price of sugar increases by 25%, by what percentage must consumption be reduced so that expenditure remains the same?

A. 25%

B. 30%

C. 15%

D. 20%

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Correct Answer: Option D

Explanation:
Required reduction = (R / (100 + R)) * 100. (25 / 125) * 100 = 20%.

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Question #3

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In an exam, 40% failed in Science, 30% in Social, 20% in both. Pass percentage is:

A. 50%

B. 40%

C. 45%

D. 55%

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Correct Answer: Option A

Explanation:
Failed in at least one = 40+30-20 = 50%, pass = 50%.

This question belongs to: Maths Percentage

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