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Random Variablesmedium
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Consider a discrete random variable XXX with the probability mass function (PMF) P(X=k)=ckP(X=k) = c kP(X=k)=ck for k∈{1,2,3}k \in \{1, 2, 3\}k∈{1,2,3}. What is the value of the constant ccc?