In a community 30% of the adults are Republicans, 50% are
Chapter , Problem 7(choose chapter or problem)
In a community 30% of the adults are Republicans, 50% are Democrats, and the rest are independent. For a randomly selected person, let X = B 1 if he or she is a Republican 0 otherwise, Y = B 1 if he or she is a Democrat 0 otherwise. Calculate the joint probability mass function of X and Y .
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