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

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Reference no: EM13617168

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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