Refresher - Venn Diagram

Venn Diagram

The intersection of Two sets A and B, denoted by ${\displaystyle A\cap B}$, is the set of all elements which belong to both A and B.( This contains all of the elements which are in both A and B)

The Complement of A, denoted by ${\displaystyle A^c}$, (or sometimes ${\displaystyle \overline{A}}$)is the set of all elements which do not belong

The Union of two sets A and B, denoted by ${\displaystyle A\cap B}$ is the set of all elements which belong to A or B (the union of sets A and B and contains all of the elements of both A and B).