Lecture 5 (Discrete Math)

By definition, A ∩ B is:

1. A.The set of all x such that x ∈ A or x ∈ B.
2. B.The set of all x such that x ∈ A and x ∈ B.
3. C.The set of all x such that x ∈ A and x ∉ B.
4. D.The set of all x such that x ∈ A or x ∉ B.