Venn Diagrams
Sources
Sources used in this book:Dean, Susan, and Barbara Illowsky. "Probability Topics: Venn Diagrams (optional)." Connexions. February 19, 2009. http://cnx.org/content/m16848/1.9/.
Embracing Mathematics, Assessment & Technology in High Schools; a Michigan Mathematics & Science Partnership Grant Project
Stark, Philip B. "Venn Diagram." 9/9/2008.http://www.stat.berkeley.edu/~stark/Java/Html/Venn.htm (accessed 7/28/2010).