Choosing two roles from five people gives 5×4 ordered assignments, but choosing an unordered pair gives 5×4/2.
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Permutations count ordered selections, while combinations count selections where order does not matter. Experiment with a small example and see each step update.
Choosing two roles from five people gives 5×4 ordered assignments, but choosing an unordered pair gives 5×4/2.
Read the related guide · · Bookmark this unique URL with Ctrl/Cmd+D.