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J 2 1. There are 3 defects out of 60 sensor devices. An inspector examines 6 sensor devices, which are selected at random and without

J 2

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1. There are 3 defects out of 60 sensor devices. An inspector examines 6 sensor devices, which are selected at random and without replacement. (a) Find the probability that at least 1 defective sensor device among the 6 inspected sensor devices. (b) How many sensor devices should be examined so that the probability of finding at least 1 defective sensor device exceeds 0.5

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