Answer: 0.6.
- A 0.6
- B 0.7
- C 0.5
- D 0.8
Correct answer: A. 0.6
Explanation: P(A ∪ B) = 0.3 + 0.4 - 0.1 = 0.6.
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