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If the variance of 1,2,3,4,5 , …., 10 is...

If the variance of 1,2,3,4,5 , …., 10 is `(99)/(12)`, then the standard deviation of 3,6,9,12,…..,30 is

A

`(297)/(4)`

B

`(3)/(2)sqrt(33)`

C

`(3)/(2)sqrt(99)`

D

`sqrt((99)/(12))`

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