# Bernoulli Trials and Family Planning

by Eugene F. Krause (University of Michigan)

Mathematics Magazine
June, 2000

Subject classification(s): Elementary Probability | Probability | Statistics and Probability
Applicable Course(s): 7.2 Probability

The expected waiting time for $n$ successes and $m$ failures in Bernoulli trials is calculated in two different, but complementary, ways.

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