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OpenStudy (anonymous):
C 7 5
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OpenStudy (anonymous):
7C5
OpenStudy (saifoo.khan):
use a calculator. =)
OpenStudy (saifoo.khan):
21
OpenStudy (saifoo.khan):
calculator*
OpenStudy (anonymous):
Just use the binomial formula
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OpenStudy (anonymous):
lol calculator for 7C5, its just 7! / (5!2!)
OpenStudy (anonymous):
thanks !
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