Selected MCQ

Current Question
If salary increases 20% then decreases 20%, net effect is ____.
  • A. Rs. 8000
  • B. Rs. 7500
  • C. Rs. 7400
  • D. Rs. 7200
Correct Answer: B
Explanation:
Net decrease = 4%.
Related Question 1
If a number increases by 30% and then decreases by 20%, net effect is ____.
  • A. 4% increase
  • B. 4% decrease
  • C. No change
  • D. 6% increase
Correct Answer: A
Explanation:
1.3 × 0.8 = 1.04 → 4% increase.
Related Question 2
If a number decreases by 50% and then increases by 100%, net effect is ____.
  • A. No change
  • B. 50% increase
  • C. 50% decrease
  • D. 100% increase
Correct Answer: A
Explanation:
0.5 × 2 = 1.
Related Question 3
A population decreases by 10% and then increases by 10%. Net effect is ____.
  • A. No change
  • B. 1% increase
  • C. 1% decrease
  • D. 2% decrease
Correct Answer: C
Explanation:
Net effect = −1%.
Related Question 4
If the price decreases by 20% and consumption increases by 25%, what is the effect on expenditure?
  • A. No change
  • B. 5% increase
  • C. 5% decrease
  • D. 10% increase
Correct Answer: A
Explanation:
0.8 × 1.25 = 1 → no change.
Related Question 5
The price of an article increases by 30% in the first year and decreases by 20% in the next year. What is the net change?
  • A. Rs. 1500
  • B. Rs. 1800
  • C. Rs. 2000
  • D. Rs. 2400
Correct Answer: C
Explanation:
Net factor = 1.3 × 0.8 = 1.04 → 4% increase.