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26 August, 01:09

To increase the mean of 4 numbers by 2. by how much would the sum of the 4 numbers have to increase?

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  1. 26 August, 03:11
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    So mean also translates to average so

    the mean of 4 numbers is aprox

    x=average

    (x+x+x+x) / 4=average

    to increase x by 2 you add 2

    x+2=average

    (x+2+x+2+x+2+x+2) = 4 = (4x+8) / 4=x+2

    you would have to increase the sum/total by 8 to make the numbers' averages' go up by 2
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