Question: Let random variable X have mgf mX(t)=0.2+0.4et + 0.1et + 0.3e2t . Use mX to obtain E[X(X 1)(X 2)]the third factorial moment of

Let random variable X have mgf mX(t)=0.2+0.4e−t + 0.1et + 0.3e2t

. Use mX to obtain E[X(X − 1)(X − 2)]—the third factorial moment of X.

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