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Random Variablesmedium
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A discrete random variable XXX takes values 0,1,20, 1, 20,1,2 with probabilities P(X=0)=0.2,P(X=1)=0.5,P(X=2)=0.3P(X=0)=0.2, P(X=1)=0.5, P(X=2)=0.3P(X=0)=0.2,P(X=1)=0.5,P(X=2)=0.3. What is the variance of XXX?