# Statistics: Polygraph Test Probability

If 3 of the 98 test subject are randomly selected without replacement, find the probability that they all had false positive results. It is unusual to randomly select 3 subjects without replacement and get 3 results that are all false positive results? Explain.

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(a) There are 42 false positive test results in a total of 98 test results

Probability that the first test subject had a false positive test result = 42/98

Probability that the second ...

#### Solution Summary

The expert examines a polygraph test probability. A complete, neat and step-by-step solution is provided.

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