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Sam has nine flower pots, and want to display four of them on the front porch, in a row. (The order of the pots matters.) How many different displays are possible?
 

 Apr 7, 2018
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Permutations of 9 flower pots taken 4 at a time:

nPr = 9P4 = 3,024 - displays possible when order of flower pots matters.

 Apr 7, 2018

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