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COUNTING TECHNIQUES
Yes
No
Yes
No
Factorial:
n! = n(n-1)(n-2)(n-3)….(2)(1)
6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
5! = 5 x 4 x 3 x 2 x 1 = 120
4! = 4 x 3 x 2 x 1 = 24
3! = 3 x 2 x 1 = 6
2! = 2 x 1 = 2
1! = 1
0! = 1
(by definition)
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- Spring '10
- Kazaryan
- Permutations, Counting, Highly composite number, repetitions
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