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OpenStudy (anonymous):
jack wants to burn 3 movies onto dvd, has 9 to choose from. A) how many different selections are there (order doesn't matter) B)how many arrangements are there(order matters) C) is it possible to have more selections than arrangents
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OpenStudy (anonymous):
i) 9 C 3 ii) 9P 3 iii) do that yourself :D
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