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Mathematics, 26.10.2021 23:30 aj0914

Twenty microprocessor chips are in stock. Three have etching errors that cannot be detected by the naked eye. Five chips are selected and installed in field equipment. (a) Find the density for X, the number of chips selected that have etching errors. (b) Find E[X] and V ar[X]. (c) Find the probability that no chips with etching errors will be selected.

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