A discrete random variable XXX has PMF P(X=k)=c(k+1)P(X=k) = c(k+1)P(X=k)=c(k+1) for k∈{0,1,2}k \in \{0, 1, 2\}k∈{0,1,2}. Find E[X]E[X]E[X].
4/34/34/3
7/67/67/6
3/23/23/2
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