A man's salary was reduced by 50% and then increased by 50%. Find the net change in his salary. MCQ with Answer and Explanation

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A man's salary was reduced by 50% and then increased by 50%. Find the net change in his salary.

A. 40% decrease

B. 15% decrease

C. 30% decrease

D. 25% decrease

Answer: Option D

Solution (By JKSSB Mock Tests)

0.5 × 1.5 = 0.75, 25% decrease.

This question belongs to: Maths Percentage

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Question #1

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A man gave 35% of money to wife, 40% of remainder to son, rest to daughter. Daughter got Rs. 3900. Total money:

A. 12000

B. 10000

C. 9000

D. 8000

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Correct Answer: Option B

Explanation:
Wife 35%, left 65%, son 40% of 65% = 26%, left 39% = 3900 → total = 10000.

This question belongs to: Maths Percentage

Question #2

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A train 250 m long passes a man running at 5 kmph in the same direction in which the train is going, in 10 seconds. Find the speed of the train.

A. 80 kmph

B. 90 kmph

C. 95 kmph

D. 85 kmph

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Correct Answer: Option C

Explanation:
Relative speed = (250/10) m/s = 25 m/s = 90 kmph. Speed of train = relative speed + man's speed = 90 + 5 = 95 kmph. (Man running same direction, so train overtakes, relative speed = train speed - man speed). So train speed = 25 m/s + 5 kmph? 25 m/s = 90 kmph, man 5 kmph, so train 95 kmph. Yes.

This question belongs to: Maths Percentage