issb mathematics MCQ #6

Average of 5 numbers is 20. If one number is removed, average becomes 18. The removed number is:

issb mathematics MCQ #6

  1. Question 1

    Q1. Average of 5 numbers is 20. If one number is removed, average becomes 18. The removed number is:

    • A) 24
    • B) 26
    • C) 28
    • D) 30

    Answer: 28

    Explanation: Sum of 5 = 100. Sum of 4 = 72. Removed = 100 − 72 = 28. Use totals, not averages, when numbers are added/removed.