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Our event of interest is whether a defective chip is found in a set of chips,...

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Basic Math

Our event of interest is whether a defective chip is found in aset of chips, and let Y be the number of chips that must be sampleduntil a defective one is found. The researchers estimate theprobability of a defective chip at 30%. What is the probabilitythat the 8th selected chip be the first defective one?

Answer & Explanation Solved by verified expert
3.9 Ratings (720 Votes)

P(defective) = 0.3

P(8th selected chip be the first defective one) = P(no defective on first 7) * P(defective)

                                                                         = (1 - 0.3)7 * 0.3

                                                                         = 0.0247
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