Answer: 64.
- A 8
- B 64
- C 512
- D 16
Correct answer: B. 64
Explanation: The 3 diagonal pairs are fixed; the other 6 are free, giving 2⁶ = 64.
A Venn diagram makes set identities visual: A∪B is everything inside either circle, A∩B is only the overlap, and the region outside both circles represents the complement of their union - directly illustrating De Morgan's law (A∪B)′ = A′∩B′.
Concept context
Types of sets, operations (union/intersection/complement), relations, and types of functions with domain and range