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The standard deviation of a,a + d,a + ...

The standard deviation of
a,a + d,a + 2d……,a + 2nd is

A

nd

B

`n^(2) d`

C

`sqrt((n(n + 1))/(3))d`

D

`sqrt((n(n + 3))/(3)) d`

Text Solution

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The correct Answer is:
c
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