Our opening quote contended that Venn diagrams are overrated. Even those who agree must admit that they have a curious allure ...

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 ...

Venn diagrams are used to sort sets of data. The probability of an event not happening uses the complement of the region on the Venn diagram. Count the number of elements in each region.