(The union of A and B). The Venn diagram below is the graphical representation of two more sets. The sets represent information about two sisters - Leah (L) and Kelly (K) and their interests.

It is really important you draw the Venn diagram and add information as you go along. This will help you keep an overview of what is going on. 11 visitors have seen Band X and Band Y only.

Venn diagrams and set theory are powerful tools for analytical ... How do you handle situations where the information is incomplete, conflicting, or vague? In this article, you will learn some ...