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OpenStudy (anonymous):
Which of the following expressions would give the number of ways to choose a group of 7 from a group of 15?
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hero (hero):
Try 15C7
hero (hero):
Yeah, that's basically the same thing
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hero (hero):
lol, you're posting all of the answer choices. Okay. Well, I gave you a really good hint.
OpenStudy (anonymous):
i dont get it
hero (hero):
If only you knew what 15 C 7 meant
OpenStudy (anonymous):
http://www.coolmath.com/algebra/20-combinatorics/05-combinations-01.htm Scroll through the tutorial (I don't want to write that much stuff).
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