For a random variable X, if Var(X)=5 and E (X^2 )=21, the value o… - Vidyadip

MCQ

For a random variable $X$, if $\operatorname{Var}(X)=5$ and $E\left(X^2\right)=21$, the value of $E(X)$ is ______

A
6
B
3
C
5
✓
4

✓

Answer

Correct option: D.

4

D

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