Question

A cryogenic temperature detector system uses two devices, a and
b. if cryogenic temperature is present the probability that it will be detected by device a is 0.95; by device b is 0.98; and by both devices, 0.94 find the probability that the cryogenic temperature will not be detected. 0.01 0.99 0.06 0.94

Answer 1

Since 0.94 is the probability of both devices detecting, the probability of neither doing so is 1-0.94=0.06, answer 3.