यदि Sigma(i=1)^(9) (x(i)-5)=9 तथा Sigma(...

यदि `Sigma_(i=1)^(9) (x_(i)-5)=9` तथा `Sigma_(i=1)^(9) (x_(1)-5)^(2)=45` है, तब 9 अवयवों `x_(1), x_(2),...,x_(9)` का मानक विचलन है:

A

9

B

4

C

2

D

3

Verified by Experts

The correct Answer is:

C

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