Suppose that X and Y have a discrete joint distribution for which the joint p.f. is defined

Question:

Suppose that X and Y have a discrete joint for which the joint p.f. is defined as follows:

Determine
(a) the value of the constant c;
(b) Pr(X = 0 and Y =ˆ’2);
(c) Pr(X = 1);
(d) Pr(|X ˆ’ Y| ‰¤ 1).

Distribution
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