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a local library shows movies on Thursday evening.the library administrator has chosen the next 6 movies he will show , but he has not decided in which order to show them. how many possible orderings of the six movie are there?
For the first movie he has 6 choices, then for the second since he has chosen the first there are only 5 left, then for the third there are only 4 choices left and so on.
Therefore the answer is 6!=6*5*4*3*2=720 orderings
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