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 A teacher wants to arrange 3 copies of Introduction to Geometry and 4 copies of Introduction to Number Theory and 2 copies of Introduction to Algebra on a bookshelf. In how many ways can he do that?

 Nov 29, 2020
 #1
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AAA BBBB CC  in a row

 

9! / (3!*4!*2!)

 Nov 29, 2020

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