Ash, Carol (1993)

The Probability Tutoring Book: An Intuitive Course for Engineers and Scientists (and Everyone Else!), The Institute of Electrical and Electronics Engineers, Inc., New York. Chapter 2 Independent Trials and 2-Stage Experiments: Section 2-1 Conditional Probability and Independent Events, pp. 37-45; Section 2-4 The Theorem of Total Probability and Bayes' Theorem, pp. 56-62.