Question: 4. Random variable and have the following joint probability distribution. x f(x,y) 1 2 3 1 0.1 0.1 0.15 y 2 0.05 0.05 0.2

4. Random variable and have the following joint probability distribution. x f(x,y)

4. Random variable and have the following joint probability distribution. x f(x,y) 1 2 3 1 0.1 0.1 0.15 y 2 0.05 0.05 0.2 3 0.15 0.1 0.1 a) Find P(X + Y4). b) Find the marginal probability distributions f(x) and f(y). c) Find P(X

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