A Venn diagram is an illustration that uses overlapping circles to show commonalities and differences between things or groups of things.

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. Redraw ...

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

Joint probability is a statistical measure that calculates the likelihood of two events occurring together and at the same point in time.

Venn had initially used diagrams developed by the Swiss mathematician Leonard Euler to show some relationships between sets, which he then developed into his famous Venn diagrams.