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OpenStudy (anonymous):
The members of an organization are 10 men and 11 women. What is the probability that a committee of three selected at random is all female?
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OpenStudy (raden):
11C3 / 21C3 = ...
OpenStudy (raden):
use the combination formula : nCr = n!/(n-r)!r!
OpenStudy (anonymous):
Oh! Haha thanks
OpenStudy (raden):
welcome
OpenStudy (anonymous):
I got 1,330. Does that mean that it is 1/1,330?
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OpenStudy (raden):
1,330 from the result of 21C3, right ? how about 11C3 = ... ?
OpenStudy (anonymous):
Never mind! it is 33/266
OpenStudy (anonymous):
Thanks for the help
OpenStudy (raden):
yes, u are right... yw
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