Q7 of 108 Page 33

The mean deviation of the series a, a+d, a+2d, ……, a+2n from its mean is

Given, Series is a, a+d, a+2d,…,+a+2n

Mean (X) =









Now, deviation from mean is xi-X


M.D =


M.D =


M.D =


Hence, M.D =

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