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OpenStudy (anonymous):
9 students volunteer for a committee. How many different 7 person committees can be chosen?
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OpenStudy (anonymous):
The formula for the number of combinations of n things taken r at a time is C(n,r) = n! / r! (n-r)! n!= (n)(n-1)(n-2)... etc.
OpenStudy (anonymous):
dud sorry but i can thelp this is like college stuff im only in nith grade
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