Question: A discrete random variable X has PMF given as: P(X=k)=k/10, k=1,4,3,2. Find the probability generating function of X and use it to find the variance

A discrete random variable X has PMF given as: P(X=k)=k/10, k=1,4,3,2. Find the probability generating function of X and use it to find the variance of X.

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