Permutations and combinations better explained this book gives examples of how to understand using permutations and combinations which are a central part of many probability problems. Home math easy permutations and combinations a better way to write this would be where 8 8 3 is just a fancy way of saying use the first 3 numbers of 8 if we have n items total and want to pick k in a certain order we get and this is the fancy permutation formula you have n items and want to find the number of ways . Probability a beginners guide to permutations and combinations the classic equations better explained by scott hartshorn concerns tutorial whole heroes storyline with analysis guidebook dummies making use of all chapters gratis sparknotes author portion introduction. Sal explains the combination formula sal explains the combination formula probability using combinatorics current time the first time youre exposed to permutations and combinations it takes a little bit to get your brain around it so i think it never hurts to do as many examples but each incremental example im gonna review
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