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x(1),x(2),x(3), . . .,x(n) is a series. ...

`x_(1),x_(2),x_(3), . . .,x_(n)` is a series. Mean and variance of this series are `overline(x)` and `sigma^(2)` respectively.
If 7 be added to each term of the series, then the new variance will be -

A

`sigma^(2)`

B

`sigma^(2)+7`

C

`sigma^(2)+6`

D

`sigma`

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The correct Answer is:
A
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