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Any tips for combinations/permutations?

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Any tips for combinations/permutations? [#permalink] New post 27 Jan 2008, 13:55
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I'm using the Manhattan anagram strategy to calculate combinations/permutation. My biggest issue is trying to figure out when order matters and doesn't matter. For me I don't see how order matters in some problems, when the answer says it does. Any tips for me?
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Re: Any tips for combinations/permutations? [#permalink] New post 27 Jan 2008, 14:02
Try these links:

http://www.gmatclub.com/forum/t56486 - Combination-Permutation-Probability quant problems: my list with links
http://www.gmatclub.com/forum/t57156 - Combination-Permutation-Probability quant problems: list of 55 different question with explanation [Amardeep Sharma]
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Re: Any tips for combinations/permutations?   [#permalink] 27 Jan 2008, 14:02
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