The X is a discrete random variable assuming values x1, x2, ...., xn, – McqOptions

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1.	The X is a discrete random variable assuming values x1, x2, ...., xn, with probabilities p1, p2, ....,pn respectively, then the variance of X is given by
A.	E(X2)
B.	E(x2) + E(x)
C.	E(X2) - [E(X)]2
D.	\(\sqrt{E(X^2)-[E(X)]^2}\)
Answer» D. \(\sqrt{E(X^2)-[E(X)]^2}\)

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