Set notation is used to describe different regions close regionAn identified area on a diagram or graph. on a Venn diagram: ξ represents the universal set. A represents set A and B represents set ...

There are more aesthetic ways of illustrating four-set Venn diagrams, such as this example created by John Venn himself, who devised the first diagrams in the 1880s.

Learn about finding probabilities from Venn diagrams with this BBC Bitesize Maths article. For students between the ages of 11 and 14.