SOLUTION: in how many ways can you choose 2 side dishes out of 10? A.)180 B.)90 C.)45 D.)20

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Question 307601: in how many ways can you choose 2 side dishes out of 10?
A.)180 B.)90 C.)45 D.)20
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If you can choose the same one twice, it's 10*10 = 100. I don't know why you can't do that, but it's not one of the options listed.
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The 1st choice is 1 or 10, the 2nd is 1 of 9
10*9 = 90
B. 90