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Exam P:Probability機率題庫下載題庫

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149. In a shipment of 20 packages, 7 packages are damaged. The packages are randomly inspected, one at a time, without replacement, until the fourth damaged package is discovered.

Calculate the probability that exactly 12 packages are inspected.
(A) 0.079
(B) 0.119
(C) 0.237
(D) 0.243
(E) 0.358


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149. In a shipment of 20 packages, 7 pac..-阿摩線上測驗