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Random Variableshard
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Let XXX have the moment generating function MX(t)=1(1−3t)2M_X(t) = \frac{1}{(1-3t)^2}MX​(t)=(1−3t)21​ for t<13t < \frac{1}{3}t<31​. What is the variance Var(X)Var(X)Var(X)?