issb mathematics MCQ #190

Average of 10 numbers is 20. If one number 30 is replaced by 40, new average is:

issb mathematics MCQ #190

  1. Question 1

    Q1. Average of 10 numbers is 20. If one number 30 is replaced by 40, new average is:

    • A) 20
    • B) 21
    • C) 22
    • D) 19

    Answer: 21

    Explanation: Total was 200. Replacing 30 with 40 adds 10, so total becomes 210. Average is 21.