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Which of the following is variance of ra...

Which of the following is variance of random variable `x=x_(i)` and `P(x=x_(i))=p_(i)`

A

`sum(x_(i).P_(i))`

B

`sum(x_(i)^2.p_(i))-mu^(2)`

C

`(sumX_(i).P_(i))-mu^(2)`

D

`2sum(x_(i)-mu)^(2).P_(i)`

Text Solution

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The correct Answer is:
B
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