alleryBayes' theorem relates P(A|B) and P(B|A):
AP(A|B) = P(B|A)
BP(A|B) = P(B|A) × P(A) / P(B)
CP(A|B) = P(A) + P(B)
DCannot relate
Answer & Solution
Correct answer: B. P(A|B) = P(B|A) × P(A) / P(B)
**Bayes' theorem:** P(A|B) = P(B|A) × P(A) / P(B).
Crucial for inverse probability problems (e.g., disease testing given a positive result).
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