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Random Variableshard
0:00.0

A discrete random variable XXX has P(X=1)=0.3P(X=1)=0.3P(X=1)=0.3, P(X=2)=0.5P(X=2)=0.5P(X=2)=0.5, P(X=3)=0.2P(X=3)=0.2P(X=3)=0.2. Find E[X]E[X]E[X].