Answer: 1.
- A 0
- B 0.5
- C 1
- D Undefined
Correct answer: C. 1
Explanation: A certain event always occurs, so P(certain) = 1.
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