30 According to a federal agency, when a lie detector test is given to a
truthful person, the probability that the test will show that the person
is not telling the truth is 20%. If a company interviews five truthful
candidates for a job and asks about thefts from prior employers, what is
the probability a lie detector test will show that at most one candidate
is not telling the truth?
[14]
Math. B – Jan. ’10