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Difference between combinations and permutations

 Apr 24, 2014

Best Answer 

 #1
avatar+130493 
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Difference between combinations and permutations

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Combinations count sets of things

Permutations count arrangements within sets

For instance, in combinations, the set {1,2} is the same as set {2,1}. The set is counted once.

However, permutations view the two sets as completely different things. Thus, in permutations, {1,2} ≠ {2,1}.  

 Apr 24, 2014
 #1
avatar+130493 
+5
Best Answer

Difference between combinations and permutations

-----------------------------------------------------------------------------------------------------------------

Combinations count sets of things

Permutations count arrangements within sets

For instance, in combinations, the set {1,2} is the same as set {2,1}. The set is counted once.

However, permutations view the two sets as completely different things. Thus, in permutations, {1,2} ≠ {2,1}.  

CPhill Apr 24, 2014

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