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Math Statistics

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The mean height of Pat, Dex, Allan, Dan and Roy is 68 inches. If George is included in the group, the mean height becomes 67 inches. How tall is George?

  • Math Statistics -

    Show that 2Radical2an irrational number

  • Math Statistics -

    Your last 4 or 5 questions have all been the same type.
    I will do this one and let you do the others in the same way

    The average for the 5 boys is 68, so their total heights is 5(68) = 340
    Let George's height be x

    (x + 340)/6 = 67
    x+340 = 402
    x = 62

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