(Answered) Oil drilling a geologist is using seismographs to test for

Statistics

Oil Drilling: A geologist is using seismographs to test for oil. It is found that if oil is present, the test gives a positive result 95% of the time, and is oil is not present; the test gives a positive result 2% of the time. Oil is actually present in 1% of the cases tested. If the test shows positive, what is the probability that oil is present?

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