SOLUTION: easy way to understand permutation and combinations.

Question 559896: easy way to understand permutation and combinations.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Permutation (nPr): number of ways to choose r objects from a collection of n, assuming that order matters

Combination (nCr): number of ways to choose r objects from a collection of n, assuming that order doesn't matter

Note the subtle "difference" between the two.
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