A truth serum has the property that 93% of the guilty suspects are properly judged while, of course, 7% of the guilty  suspects are improperly found innocent. On the other hand, innocent suspects are misjudged 3% of the time. If the  suspect was selected from a group of suspects of which only 7% have ever committed a crime, and the serum  indicates that he is guilty, what is the probability that he is innocent? Use Bayes

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