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Algebra 21 Online
OpenStudy (anonymous):

How many different menus showing 10 main courses can a restaurant make if it has 15 main courses from which to choose?

Directrix (directrix):

Assuming that the order of the 10 main courses listed on a given menu does not matter, then use the combination formula to crank out the answer. You are choosing 10 menus from 15 and the order of selection does not matter.

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