Let x1 x2 x3nbspbe a random sample of size n3 from the

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Let X1, X2, X3 be a random sample of size n=3 from the Poisson distributions with respective means l1 = 4, l2= 5, l3= 5.

a) Find P(X1 + X2 + X3 = 1)

b) Find the mean and variance of Y = X1 + X2 + X3

Reference no: EM13617168

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