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Random Variablesmedium
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A discrete variable XXX has a probability mass function P(X=k)=ck(k+1)P(X=k) = \frac{c}{k(k+1)}P(X=k)=k(k+1)c​ for k=1,2,3,…k=1, 2, 3, \dotsk=1,2,3,…. What is the value of ccc?