ashleam1010 ashleam1010

14-07-2017
Mathematics

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How many different selections of 4 books can be made from a bookcase displaying 12 books?

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musiclover10045 musiclover10045

14-07-2017

(12 x 11 x10 x9) / (4 x3 x 2 x 1) = 495

there are 495 different ways to select 4 books

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