Answer: 0.4.
- A 0.2
- B 0.4
- C 0.5
- D 0.8
Correct answer: B. 0.4
Explanation: P(A|B) = P(A ∩ B)/P(B) = 0.2/0.5 = 0.4.
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