The Venn diagram shows the result of some people saying whether they like tea and coffee. Find the probability that a person chosen at random likes either tea or coffee but not both. P(like only ...

Venn studied and taught logic and probability theory at Cambridge University, where he developed his method of using diagrams to illustrate the branch of mathematics known as set theory.

One of Venn’s major achievements was to find a way to visualise ... works of Venn’s include probability theory and symbolic logic. Venn had initially used diagrams developed by the Swiss ...