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Alex has 10 different kinds of lunch meat and 9 different kinds of cheese. If he wants to make a sandwich with one kind of meat and two kinds of cheese, how many different sandwiches could he make? (It does not matter in which order he chooses the two types of cheese.)

 Jul 9, 2020
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10   x     9 c 2  = 360

 Jul 9, 2020

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