Selected MCQ

Current Question
If the average of 10 numbers is 40, what is the total sum?
  • A. 400
  • B. 450
  • C. 350
  • D. 420
Correct Answer: A
Explanation:
Sum = average × count = 400.
Related Question 1
If the average of 4 numbers is 25, what is their total?
  • A. 50
  • B. 75
  • C. 100
  • D. 125
Correct Answer: C
Explanation:
Total = 25×4 = 100.
Related Question 2
The sum of five numbers is 655. The average of the first two is 85. Find the sum of the last three.
  • A. 180
  • B. 170
  • C. 190
  • D. 175
Correct Answer: A
Explanation:
Subtract known sum.
Related Question 3
If the average of 5 numbers is 20, their sum is ____.
  • A. 80
  • B. 90
  • C. 100
  • D. 120
Correct Answer: C
Explanation:
Sum = average × count.
Related Question 4
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 5
The average of 7 numbers is 49. If one number is replaced by 70, the average becomes 50. What was the original number?
  • A. 40
  • B. 42
  • C. 43
  • D. 45
Correct Answer: B
Explanation:
Difference in total = 7 ⇒ original = 42.