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Find the mean deviation from the mean of...

Find the mean deviation from the mean of the A.P., a,a+d, a+2d, .........,a+2nd.

A

` ( n(n+1)d^(2))/( 3)`

B

` ( n(n+1))/( 2 ) d^(2)`

C

` a+( n(n+1)d^(2))/( 2) `

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
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