SOLUTION: In how many ways can you choose 2 side dishes from 15 entrees?

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Question 731274: In how many ways can you choose 2 side dishes from 15 entrees?
Found 2 solutions by rfer, richwmiller:
Answer by rfer(16322) About Me  (Show Source):
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
That depends on how you look at it.
Have you already taken your entree?
or are all of the 15 available for side dishes
first side dish has 15 choices
can you repeat the the side dishes?
no repeat
then there are 14 choices for the secind
15*14=210 choices for 2 side dishes
if all 15 are available for the first and 14 (no repeats) are available for the second