If you haven't read GMAT Combinatorics 1.0, 1.1, and 1.2, you should do that before you read any further. Even if you're familiar with some of the material, you may not be familiar with my approach. Though the subtitle of this posts suggests that I'm going to discuss permutations and combinations, I'm never going to formally define either one - that's right no formulas. Just careful application of the fundamental counting principle with a couple of modifications.
GMAT & MBA Admissions Blog
GMAT Combinatorics 2.0: Permutations and Combinations
Posted by Mark Skoskiewicz on December 28, 2011 7:20:00 AM CST
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Tags: Probability, Quant, GMAT Blog, Combination, Combinatorics, Permutation
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