Selected MCQ

Current Question
A pupil’s marks were recorded as 83 instead of 63. As a result of this error, the average increased by 0.5. How many students are there?
  • A. 10
  • B. 20
  • C. 40
  • D. 73
Correct Answer: C
Explanation:
Increase of 20 marks spread over students ⇒ 20 ÷ 0.5 = 40.
Related Question 1
A student scores 60 in Maths and Physics. Chemistry is 20 marks more than Maths. Find the average marks.
  • A. 40
  • B. 30
  • C. 25
  • D. Data inadequate
Correct Answer: A
Explanation:
Total = 60 + 60 + 80 = 200 → avg = 40.
Related Question 2
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 3
In an exam, the average marks per paper are 63. Total papers are ____.
  • A. 8
  • B. 9
  • C. 10
  • D. 11
Correct Answer: D
Explanation:
Based on the total marks division.
Related Question 4
In an exam, three students score 64%, 36%, and 44% of 800 marks. What is the average score?
  • A. 384
  • B. 364
  • C. 324
  • D. 404
Correct Answer: A
Explanation:
Average = 48% of 800 = 384.
Related Question 5
The average marks of a class are 60. If the top 5 students average 80, what is the average of the remaining?
  • A. 50
  • B. 55
  • C. 58
  • D. 60
Correct Answer: B
Explanation:
Weighted average calculation.