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For the arithmetic progression a, (a+d...

For the arithmetic progression
`a, (a+d), (a+2d), (a+3d), …, (a+2nd),`
the mean deviation from mean is :

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
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