general math MCQ #12063

The harmonic mean of 2 and 8 is: HM = 2/(1/2 + 1/8) = 2/(4/8 + 1/8) = 2/(5/8) = 16/5 = 3.2

general math MCQ #12063

  1. Question 1

    Q1. The harmonic mean of 2 and 8 is: HM = 2/(1/2 + 1/8) = 2/(4/8 + 1/8) = 2/(5/8) = 16/5 = 3.2

    • A) 4
    • B) 5
    • C) 3.2
    • D) 2.5

    Answer: 3.2

    Explanation: The harmonic mean of two numbers a and b is 2ab/(a+b); for 2 and 8: 2×2×8/(2+8)=32/10=3.2.