Income of A is 20% more than B. B's expenditure is 30% less than A's. A saves 10% of his income. B saves what % of his income? MCQ with Answer and Explanation

Income of A is 20% more than B. B's expenditure is 30% less than A's. A saves 10% of his income. B saves what % of his income?

A. 22.4%

B. 24.4%

C. 26.4%

D. 28.4%

Answer: Option B

Let B inc = 100, A inc = 120. A sav = 12, A exp = 108. B exp = 70% of 108 = 75.6. B sav = 100-75.6 = 24.4, i.e. 24.4%.

This question belongs to: Maths Percentage

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Question #1 Report Error

A number increased by 60% then decreased by 60% gives 256. The number is:

A. 380

B. 360

C. 400

D. 420

Correct Answer: Option C

Explanation:
1.6 × 0.4 = 0.64, 0.64x=256 → x=400.

This question belongs to: Maths Percentage

Question #2 Report Error

Two alloys have copper 70% and 40%. Mixed to get 55% copper. Ratio of mixing:

A. 2:1

B. 1:1

C. 1:2

D. 3:2

Correct Answer: Option B

Explanation:
Alligation: (70-55):(55-40) = 15:15 = 1:1.

This question belongs to: Maths Percentage

Question #3 Report Error

20% of a number is 30. 60% of that number is:

A. 80

B. 60

C. 100

D. 90

Correct Answer: Option D

Explanation:
Number = 30/0.2 = 150; 60% of 150 = 90.

This question belongs to: Maths Percentage