document.write( "Question 849373: if eight different books are arranged at random in a shelf, what is the probability that a certain pair of books
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Algebra.Com's Answer #511506 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, Previously Posted
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document.write( "eight different books 8! total ways of arranging on shelf
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document.write( "thinking OF A 'PAIR' AS ONE UNIT
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document.write( "P(beside each other) = 7!/8!
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document.write( "P(not be together) = 1 - P(together) = 1- 7!/8! \n" );
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