If the price of tea increases by 20%, by what percentage must consumption be reduced to keep expenditure constant? MCQ with Answer and Explanation

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If the price of tea increases by 20%, by what percentage must consumption be reduced to keep expenditure constant?

A. 15%

B. 20%

C. 16.67%

D. 25%

Answer: Option C

Solution (By JKSSB Mock Tests)

Required reduction = (20 / 120) * 100 = 100 / 6 = 16.67%.

This question belongs to: Maths Percentage

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Question #1

Side of square increased 15%. % increase in area:

A. 40%

B. 30%

C. 35%

D. 32.25%

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Correct Answer: Option D

Explanation:
Area multiplier = 1.15² = 1.3225, increase 32.25%.

This question belongs to: Maths Percentage

Question #2

If x is 80% of y, what percentage of x is y?

A. 125%

B. 100%

C. 120%

D. 80%

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Correct Answer: Option A

Explanation:
x = 0.8y. Therefore, y = x / 0.8 = 1.25x. Thus, y is 125% of x.

This question belongs to: Maths Percentage

Question #3

80% passed English, 70% Maths, 60% both. % failed both:

A. 20%

B. 5%

C. 10%

D. 15%

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Correct Answer: Option C

Explanation:
Pass at least one = 80+70-60=90%, fail both = 10%.

This question belongs to: Maths Percentage

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