If x% of 300 = 45, then x is: MCQ with Answer and Explanation

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If x% of 300 = 45, then x is:

A. 18

B. 10

C. 15

D. 12

Answer: Option C

Solution (By JKSSB Mock Tests)

300 × x/100 = 45 → 3x = 45 → x = 15.

This question belongs to: Maths Percentage

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Question #1

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The price of an article increases by 10%, and then again by 10%. What is the net percentage increase?

A. 25%

B. 22%

C. 21%

D. 20%

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Correct Answer: Option C

Explanation:
Successive percentage formula: a + b + (ab / 100). 10 + 10 + (10 * 10 / 100) = 20 + 1 = 21%.

This question belongs to: Maths Percentage

Question #2

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The price of sugar goes up by 30%. By what percent must a householder reduce consumption so that expenditure increases only by 5%?

A. 21.5%

B. 18.5%

C. 20%

D. 19.23%

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Correct Answer: Option D

Explanation:
1.3 × x = 1.05 → x = 1.05/1.3 ≈ 0.8077, reduction 19.23%.

This question belongs to: Maths Percentage

Question #3

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A person spends 80% of his income and saves Rs. 1500. Find his income.

A. 7000

B. 7500

C. 8000

D. 6000

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Correct Answer: Option B

Explanation:
Savings = 20%. 20% of Income = 1500. Income = 1500 * 5 = 7500.

This question belongs to: Maths Percentage

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