The expectation of a random variable X (E(X)) can be written as _____

1.	The expectation of a random variable X (E(X)) can be written as _________
A.	\(\frac{d}{dt} [M_X (t)](t=0) \)
B.	\(\frac{d}{dx} [M_X (t)](t=0) \)
C.	\(\frac{d^2}{dt^2} [M_X (t)](t=0) \)
D.	\(\frac{d^2}{dx^2} [M_X (t)](t=0) \)
Answer» B. \(\frac{d}{dx} [M_X (t)](t=0) \)

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