I've been struggling for a good couple hours on the below, and I was hoping someone might be able to push me in the right direction...(adsbygoogle = window.adsbygoogle || []).push({});

"A" represents the event "the breath analyzer indicates the suspect is drunk" and "B" represents the event "the suspect is drunk." On a given Saturday night, about 5% of drivers are known to be drunk.

P(A | B) = P(compliment of A | complement of B) = p

a.) determine P(compliment of B | A) if p = .95

b.) how big should p be so that P(B | A) = 0.9?

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From the problem I can deduce that P(B) is .05 and P(compliment of A | B) = (A | compliment of B) = .05, but how can I put P(compliment of B | A) in terms of P(A | B)? Any help would be greatly appreciated.

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# Help with conditional probabilty

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