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Back to 4.4 Problems on Independence of Events

4.4 Exercise 34

Avg difficulty 2.5

Only thirty percent of the items from a production line meet stringent requirements for a special job. Units from the line are tested in succession. Under the usual assumptions for Bernoulli trials, what is the probability that three satisfactory units will be found in eight or fewer trials?

Pfeiffer, Applied Probability, 4.4 Problems on Independence of Events, exercise 34

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Adapted from Applied Probability © 2009 Paul E. Pfeiffer. Licensed under CC BY 3.0. Source: Applied Probability. Imported at revision d7a0420.