Mathigon
Mathigon: Probability and Discrete Math: Introduction
This is an introduction to the study of probability. It tells the story of two of the greatest mathematicians, Blaise Pascal and Pierre de Fermat, who used coin tosses of heads or tails to determine who paid the bill. It led to the...
University of St. Andrews (UK)
University of St. Andrews: John Venn
Good introduction to Venn's life and work. Explains especially his lifelong relationship to Cambridge. Includes links to further information on Venn's "probability theory."