Question 1184504



(a)  P(worker innocent/lie-detector "guilty") = P(worker innocent ∩ lie-detector "guilty")/P(lie-detector "guilty") = 0.095/0.14 = 19/28 = 0.67857, to 5 d.p.


(b) P(worker guilty/lie-detector "innocent") = P(worker guilty ∩ lie-detector "innocent")/P(lie-detector "innocent") = 0.005/0.86 = 1/172 = 0.005814, to 6 d.p.