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If the standard deviation of the numbers...

If the standard deviation of the numbers `-1, 0,1,k` is `sqrt(5)` where `k gt 0` , then k is equal to `2 sqrt(l)` . The value of `l` is ________.

A

` 2sqrt((10)/(3))`

B

`4sqrt((5)/(3))`

C

`2sqrt6`

D

`sqrt6`

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The correct Answer is:
C
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