Interactive Applet: Probability Venn Diagram
Now that we have introduced most of the basic probability concepts, try these interactive demonstration which uses Venn diagrams to illustrate the basic probabilities we have been discussing.
You can choose which event to shade and move the events around. Pretty neat!
This site uses a different notation instead of “AND” and “OR.” The U = OR, two events with nothing between them = AND, and the c as a superscript (in the exponent location) is for complement.
This document is linked from Basic Probability Rules.