Answer: 16.
- A 8
- B 16
- C 12
- D 4
Correct answer: B. 16
Explanation: A set with n elements has 2ⁿ subsets, so 2⁴ = 16.
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