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22-05-2018
Mathematics

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You are arranging 7 books in a row on a shelf. one of the books is a dictionary and must go in the middle. how many ways can the books be arranged?

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Аноним Аноним

22-05-2018

The other 6 books can be arranged in 6 ways

= 6*5*4*3*2*1 = 720 ways answer

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