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A book store has received 8 different books, of which 3/8

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A book store has received 8 different books, of which 3/8 [#permalink] New post 31 Jan 2008, 22:08
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A book store has received 8 different books, of which 3/8 are novels, 25% are study guides and remaining are textbooks. If all books must be placed on one shelf displaying new items and if books in the same category have to be shelved next to each other, how many different arrangements of books are possible?

18
36
72
216
432
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Re: perms arrangement of books [#permalink] New post 31 Jan 2008, 22:30
marcodonzelli wrote:
A book store has received 8 different books, of which 3/8 are novels, 25% are study guides and remaining are textbooks. If all books must be placed on one shelf displaying new items and if books in the same category have to be shelved next to each other, how many different arrangements of books are possible?

18
36
72
216
432


(E)

3P2 * 3p3 * 3p3 * 2p2 = 432
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Re: perms arrangement of books   [#permalink] 31 Jan 2008, 22:30
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A book store has received 8 different books, of which 3/8

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