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For a random variable X, E(X)=3 and E(X^...

For a random variable X, E(X)=3 and `E(X^2)=11` Then, variance of X is

A

8

B

5

C

2

D

1

Text Solution

Verified by Experts

The correct Answer is:
C
Given that , `E(X)=3 and E(X^2)=11`
variance of `X=E(X^2)-[E(X)]^2=11-(3)^2=11-9=2`
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