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28.02.2020 •
Mathematics
A small manufacturing company will start operating a night shift. there are 20 machinists employed by the company. a. If a night crew consists of 3 machinists, how many different crews are possible? b. If the machinists are ranked 1, 2, 3, . . . , 20 in order of competence, how many of these crews would not have the best machinist? c. How many of the crews would have at least 1 of the 10 best machinists? d. If one of these crews is selected at random to work a particular night, what is the probability that the best machinist will not work?
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