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Mathematics, 04.05.2021 17:00 uhhgray

Suppose that X and Y are integer-valued random variables with joint probability mass function given by 240 Joint distribution of random variables for l < b a 4 рх. yla, b-| T., 0, otherwise. (a) Show that this is indeed a joint probability mass function.
(b) Find the marginal probability mass functions of X and Y.
(c) Find P(X Y).

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