<PRE><B>Question 183556</B>
you are placing 12 pictures on separate pages in an album. how many different ways can you order the 12 pictures in the album? 
Ans: 12! = 479,001,600
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how many different ways can 4 of the 12 pictures be placed on the first 4 pages?
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12P4 = 12!/(12-4)! = 12*11*10*9 = 11,880
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Cheers,
Stan H.
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