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Asked Oct 6, 2019
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From a group of 18 customers, 4 are to be chosen to receive a special gift. Assuming that the order in which the customers are chosen is irrelevant, how many groups of 4 customers can be chosen?

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The number of groups of 4 cust...

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n! ПСх 3D (п- х)!.x! 18! 18C4 (18-4)4! 6402373705728000 (87178291200)(24) 3,060

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