issb mathematics MCQ #697

Weighted average: 3 items avg 10, 7 items avg 20?

issb mathematics MCQ #697

  1. Question 1

    Q1. Weighted average: 3 items avg 10, 7 items avg 20?

    • A) 16
    • B) 17
    • C) 18
    • D) 19

    Answer: 17

    Explanation: Total sum 30 plus 140 divided by 10 items equals 17. Work each step carefully; ISSB math rewards accuracy under time pressure.