If the standard deviation of 3,8,6,10,12...

If the standard deviation of 3,8,6,10,12,9,11,10,12,7 is 2.71 , then the standard deviation of 30, 80,60,100,120,90,110,100,120 , 70 is

A

2.71

B

27.1

C

`(2.71)sqrt(10)`

D

`(2.71)sqrt(2)`

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