issb mathematics MCQ #457

Weighted average: 5 items avg 10, 15 items avg 20?

issb mathematics MCQ #457

  1. Question 1

    Q1. Weighted average: 5 items avg 10, 15 items avg 20?

    • A) 16
    • B) 17
    • C) 17.5
    • D) 18

    Answer: 17.5

    Explanation: Total sum 50 plus 300 divided by 20 items equals 17.5. Work each step carefully; ISSB math rewards accuracy under time pressure.