Screws produced by a machine in a large company are packaged in packs of 50 screws each. The company believes that a pack cannot be
Screws produced by a machine in a large company are packaged in packs of 50 screws each. The company believes that a pack cannot be sold if it contains at least three defective screws. If it is known that the probability of a screw being defective is 0.03,
(i) find the probability that a pack cannot be sold;
(ii) to decide whether a pack should be sold, an employee checks five screws at random and decides that a pack should not be sold if it contains at least one defective screw. Find the probability that a rejected pack contains less than three defective screws, so that it could have been sold.
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Authors: Narayanaswamy Balakrishnan, Markos V. Koutras, Konstadinos G. Politis
1st Edition
1118123336, 9781118123331
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