How to find the intersection and union with sets in a venn diagram

The video tutorial explains Venn diagrams, focusing on universal sets and subsets A and B. It details how to identify elements within these sets, using brackets for notation. The tutorial further explores the concepts of intersection and union, illustrating how to find common and combined elements between sets.

Explain the concept of union in the context of sets.

What elements are included in the union of sets A and B based on the example provided?