Choosing items from a larger group, when the order does not matter. This is different than permutations in chapter 11.2 – items had to be in a certain.

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Choosing items from a larger group, when the order does not matter. This is different than permutations in chapter 11.2 – items had to be in a certain order Combinations

Combination formula n = size of the large group r = number of items chosen – not in any particular order From “n” items, choosing “r” at a time:

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