Ononot — A discrete random variable X takes values 0, 1, 2 with proba

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Random Variablesmedium

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