A service station has both self-service and full-service islands. On each island, there is a single regular unleaded pump with two hoses. Let x denote the number of hoses being used on the self-service island at a particular time, and let Y denote the number of hoses on the full-service island in use at that time. The joint pmf of X and Y appears in the accompanying tabulation. P(x, y) 1 2 ol0.10 0.05 0.01 10.06 0.20 0.08 2 0.06 0.14 0.30 * Compute the marginal pmf of X. 1 Compute the marginal pmf of Y. Using p,(x), vhat is P(Xs 1)? PIX s 1) =

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