These pages on Purplemath.com will provide further background and understanding of both Set Notation and Venn Diagrams. They provide instruction and examples.
Venn Diagrams (You'll notice the words "Page 1 of 4" at the top of this page. Be sure to look at all four pages of the Venn Diagram section.)
Licenses & Attributions
CC licensed content, Original
Mathematics for the Liberal Arts I.Provided by: Extended Learning Institute of Northern Virginia Community CollegeLocated at: https://online.nvcc.edu/.License: CC BY: Attribution.