Question: Suppose X and Y are both integer-valued random variables. Let p(i|j) = P(X = i|Y = j) and q(j|i) = P(Y = j|X = i)

Suppose X and Y are both integer-valued random variables. Let
p(i|j) = P(X = i|Y = j)
and
q(j|i) = P(Y = j|X = i)
Show that

Suppose X and Y are both integer-valued random variables. Letp(i|j)

pCili) P(X = i,Y = j) =-pun

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