Answer: P(A ∩ B) / P(B).
- A P(A) × P(B)
- B P(A ∩ B) / P(B)
- C P(A) / P(B)
- D P(B) / P(A)
Correct answer: B. P(A ∩ B) / P(B)
Explanation: Conditional probability: P(A|B) = P(A ∩ B) / P(B). Read: probability of A given B has occurred.
Venn diagram of the universal set U with events A and B, showing the intersection (A and B), the parts unique to each event, and the complement region outside both.
Concept context
Chance, events, conditional probability, and Bayes theorem