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Mathematics 17 Online
OpenStudy (anonymous):

A library has 3 books from each of 5 different authors. How many ways can the library arange the books on the shelf if books by the same author must be placed together?

OpenStudy (anonymous):

http://openstudy.com/study#/updates/523cfebde4b0fbf3cc7bc6fa different question but exact same idea and method

OpenStudy (anonymous):

i tried, but seems like different method ! i cant get the answer

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