SOLUTION: Five friends are waiting in a line. How many different ways can they arrange themselves in that line?
Algebra.Com
Question 747836: Five friends are waiting in a line. How many different ways can they arrange themselves in that line?
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
the counting principle is used to count permutations like this
5 - people can be chosen for the first position in line
4 - remain to be chosen for the second
3 - for the third
2 - for the fourth
1 - for the last
# of ways is (5)(4)(3)(2)(1)=120
:)
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