If A and B such events that P(A) 0 and P(B) ≠ 1, then P(A’|B’) equals

Question

If A and B such events that P(A) > 0 and P(B) ≠ 1, then P(A’|B’) equals

Philoid · Accepted Answer

We have P(A) > 0 and P(B) ≠ 1

By de Morgan’s Law:

P(A'∩B') = P(A∪B)^’