Answer: 1/2.
- A 1/2
- B 1/3
- C 2/3
- D 1/6
Correct answer: A. 1/2
Explanation: Primes on a die: 2, 3, 5 (three of six). P(prime) = 3/6 = 1/2.
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