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OpenStudy (blackops2luvr):
how many combinations of 4 can you get from 20?
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OpenStudy (anonymous):
Does your teacher allow the use of a calculator to compute combinations?
OpenStudy (blackops2luvr):
no
OpenStudy (blackops2luvr):
wait yea
OpenStudy (blackops2luvr):
idk maby
OpenStudy (anonymous):
Then use the definition of a combination: 20 C 4 = (20!)/[(4!)(20-4)!]
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OpenStudy (blackops2luvr):
4845?
OpenStudy (anonymous):
correct.
OpenStudy (anonymous):
You're welcome.
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