Answer: 1.
- A 0
- B 0.5
- C 1
- D 2
Correct answer: C. 1
Explanation: P(A) + P(complement of A) = 1 (one of them must always occur).
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