A smoke detector system uses two devices, A and B. If smoke is present, the probability
Chapter 2, Problem 2.94(choose chapter or problem)
A smoke detector system uses two devices, A and B. If smoke is present, the probability that it will be detected by device A is .95; by device B, .90; and by both devices, .88. a If smoke is present, find the probability that the smoke will be detected by either device A or B or both devices. b Find the probability that the smoke will be undetected.
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