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Mathematics, 27.02.2020 17:57 24nelsoaddh
Plastic parts produced by an injection-molding operation are checked for conformance to specifications. Each tool contains 12 cavities in which parts are produced, and these parts fall into a conveyor when the press opens. An inspector chooses 3 parts from among the 12 at random. Two cavities are affected by a temperature malfunction that results in parts that do not conform to specifications.
a) How many samples contain exactly 1 nonconforming part?
b) How many samples contain at least 1 nonconforming part?
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