Selected MCQ

Current Question
If population increases by 20% in one year and 25% in next, total increase is ____.
  • A. 45%
  • B. 50%
  • C. 55%
  • D. 60%
Correct Answer: B
Explanation:
1.2 × 1.25 = 1.5 → 50%.
Related Question 1
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.
Related Question 2
If the population increases by 10% annually, what is the increase in 2 years?
  • A. 20%
  • B. 21%
  • C. 22%
  • D. 19%
Correct Answer: B
Explanation:
1.1² = 1.21 → 21%.
Related Question 3
The population of a city increases at 4% annually, with an additional 1% increase. What is the total annual growth rate?
  • A. 10
  • B. 11
  • C. 10.25
  • D. 10.15
Correct Answer: C
Explanation:
Effective growth = 4% + 1% + (4×1)/100 = 5.04 ≈ 5.04%, but compounded gives 10.25 over period.
Related Question 4
The population of a town increased from 175000 to 262500 in 10 years. Find the average annual percentage increase.
  • A. 4.37%
  • B. 5%
  • C. 6%
  • D. 8.75%
Correct Answer: B
Explanation:
Using the compound growth formula gives ≈ 5% annually.
Related Question 5
If the population increases by 10% and then decreases by 10%, what is the net change?
  • A. 8500
  • B. 8000
  • C. 8100
  • D. 8400
Correct Answer: B
Explanation:
Net decrease = 1%.