Question 768446: A combination lock has 5 different numbers. If each number can only be used ONCE, how many different combinations are possible?
Answer by fcabanski(1391)   (Show Source):
You can put this solution on YOUR website! Since no number is used twice, there are 5 possibilities for the first number, 4 for the second, 3 for the third, 2 for the fourth, and 1 for the fifth.
There are 5*4*3*2*1 = 120 possible combinations.
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