Two possible observations have arithmetic mean 3 and geometric mean 22.If each observation is multiplied by 2, then harmonic mean will be  

Two possible observations have arithmetic mean 3 and geometric mean 22.If each observation is multiplied by 2, then harmonic mean will be  

  1. A

    163

  2. B

    83

  3. C

    12

  4. D

    None of these

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    Solution:

    Since, we know that

    (GM)2=AM×HM(22)2=3×HM HM=83

    Also, given here that, if each observation is multiplied
    by 2, then HM=83×2=163

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