Selected MCQ

Current Question
If the price of sugar increases by 25%, by what percent must consumption decrease to keep expenditure constant?
  • A. 20%
  • B. 25%
  • C. 30%
  • D. 15%
Correct Answer: A
Explanation:
Required decrease = 25 / 125 × 100 = 20%.
Related Question 1
If petrol price increases by 20%, by what percent should consumption decrease to keep expenditure the same?
  • A. 16⅔%
  • B. 6⅔%
  • C. 8%
  • D. 15%
Correct Answer: A
Explanation:
Required decrease = 20 / 120 × 100 = 16⅔%.
Related Question 2
The price of an item is increased by 15%. By what percent must consumption be reduced to keep expenditure constant?
  • A. 10 20/23 %
  • B. 13 1/23 %
  • C. 16 2/3 %
  • D. 15 %
Correct Answer: B
Explanation:
Reduction = 15/115 ×100 = 13 1/23%.
Related Question 3
The price of petrol has increased by 25%. By what percent should consumption be reduced to keep expenditure constant?
  • A. 25%
  • B. 30%
  • C. 50%
  • D. 20%
Correct Answer: D
Explanation:
Reduction = 25/125 ×100 = 20%.
Related Question 4
If price increases by 60% and consumption decreases by 25%, what happens to expenditure?
  • A. Increase
  • B. Decrease
  • C. Same
  • D. Doubled
Correct Answer: A
Explanation:
1.6 × 0.75 = 1.2 → 20% increase.
Related Question 5
If price increases by 50% and consumption decreases by 20%, what is the change in expenditure?
  • A. 20% increase
  • B. 25% increase
  • C. No change
  • D. 10% decrease
Correct Answer: A
Explanation:
1.5 × 0.8 = 1.2 → 20% increase.