SOLUTION: On a trip to America, Joseph went to visit 5 of the 9 historical sites. If the order of the visit matter, in how many ways can he plan the trip?

Question 1083010: On a trip to America, Joseph went to visit 5 of the 9 historical sites. If the order of the visit matter, in how many ways can he plan the trip?
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.

9*8*7*6*5 = 15120 ways.


Any of           9 sites as the first place.
Any of remaining 8 sites as the second place.
Any of remaining 7 sites as the third place.
Any of remaining 6 sites as the fourth place.
Any of remaining 5 sites as the fifth place.


In all, there are 9*8*7*6*5 = 15120 possible ways.

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