Let X1 and X2 are discrete random variable have the joint pr

Let X₁ and X₂ are discrete random variable have the joint probability mass function

(a)Verify this is a joint probability function.

(b) Find P (x₁ ? 2, x₂=1)

(c) Find the Joint CDF.

(d) Find the marginal of X1

(e) Find the P(X2/X1=1)

Solution