Answer: 8.
- A 8
- B 6
- C 3
- D 9
Correct answer: A. 8
Explanation: The number of subsets is 2ⁿ = 2³ = 8.
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