Make sure that the number of elements in the Venn diagram is equal to the number of elements in the universal set. Check that a set does not include an element that is not in the universal set.

Neil Gordon does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

A Venn diagram shows the relationship between a group ... For example, if you were to write down the number of children in your class who have brown hair in one circle, and the number of children ...