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Mathematics 15 Online
OpenStudy (anonymous):

A box of 15 parts contains 7 that are defective. A worker picks parts one at a time and attempts to install them. Find the probability of each outcome in​ Find the probability of each outcome in b) At least one of the first three is good. c) The first four picked are all good. d) The worker has to pick five parts to find that is good. (Part d is asking for the probability that the first four parts are bad, and the fifth part is good.

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