What is 30% of 400 minus 15% of 200? MCQ with Answer and Explanation

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What is 30% of 400 minus 15% of 200?

A. 90

B. 80

C. 100

D. 70

Answer: Option A

Solution (By JKSSB Mock Tests)

30% of 400 = 120, 15% of 200 = 30, difference = 90.

This question belongs to: Maths Percentage

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Question #1

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A shopkeeper sells an article at 15% profit. Had he bought it at 10% less and sold it for Rs. 10 more, he would have gained 30%. Find the cost price.

A. Rs. 400

B. Rs. 700

C. Rs. 600

D. Rs. 500

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Correct Answer: Option D

Explanation:
CP=x, SP=1.15x. New CP=0.9x, new SP=1.15x+10 = 1.3×0.9x = 1.17x → 0.02x=10 → x=500.

This question belongs to: Maths Percentage

Question #2

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A person's salary increased from 4000 to 5000. What is the percentage increase?

A. 30%

B. 20%

C. 35%

D. 25%

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Correct Answer: Option D

Explanation:
Increase = 5000 - 4000 = 1000. Percentage increase = (1000 / 4000) * 100 = 25%.

This question belongs to: Maths Percentage

Question #3

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Weight reduced from 90 kg to 81 kg. Percentage decrease:

A. 8%

B. 10%

C. 11%

D. 9%

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Correct Answer: Option B

Explanation:
Decrease = 9 kg, (9/90)×100 = 10%.

This question belongs to: Maths Percentage

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