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5 Cards in this Set
- Front
- Back
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Product rule |
a sequence can be broken down into two tasks. If n1 ways of doing task 1 and n2 ways of doing task 2, then n1*n2 ways of doing procedure |
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sum rule |
if task can be performed n1 or n2 ways, then there are n1+n2 ways to do the task |
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Generalized pigeonhole principle |
If n objects are placed into k boxes, then there is at least one box containing [N/k] objects |
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Permutation |
n!/(n-r)! |
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combination |
n!/(n-r)!(r)! |
