Income Rs. 25000, spends 64%. Income rises 20%, savings to increase 50%. % increase in expenditure: MCQ with Answer and Explanation

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

A. 3.125%

B. 6.25%

C. 5%

D. 4.167%

Answer: Option A

Solution (By JKSSB Mock Tests)

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

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Question #1

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A salary is increased by 30% and then decreased by 30%. What is the net change?

A. 9% decrease

B. 9% increase

C. 6% decrease

D. 0%

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Correct Answer: Option A

Explanation:
Net change = x^2 / 100 % decrease. 30^2 / 100 = 900 / 100 = 9% decrease.

This question belongs to: Maths Percentage

Question #2

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20% reduction in sugar price lets a person buy 5 kg more for Rs. 100. Reduced price per kg:

A. Rs. 3

B. Rs. 6

C. Rs. 5

D. Rs. 4

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Correct Answer: Option D

Explanation:
Original price x, consumption y, xy=100. New 0.8x(y+5)=100 → 0.8×100 + 4x =100 → x=5, reduced price=Rs.4.

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Question #3

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The value of a machine is 8,000. It depreciates by 20% annually. What will be its value after 2 years?

A. 6000

B. 5200

C. 5120

D. 6400

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Correct Answer: Option C

Explanation:
Value = 8000 * (0.80)^2 = 8000 * 0.64 = 5120.

This question belongs to: Maths Percentage

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