Answer: 8.
- A 8
- B 64
- C 512
- D 27
Correct answer: A. 8
Explanation: The 3 diagonal pairs are forced, and the 3 off-diagonal unordered pairs are each independently in or out, giving 2³ = 8.
Concept context
Types of relations, equivalence classes, one-one and onto functions, composition, and invertible functions