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OpenStudy (anonymous):
A test consists of 20 problems and students are told to answer any 15 of these questions. In how many different ways can they choose the 15 questions? Answers: 23,670 15,504 20,145 25,890
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OpenStudy (raden):
actually, it is 20C15
OpenStudy (raden):
can u evaluate the value of 20C15 = ...
OpenStudy (anonymous):
its 15,504 @RadEn
OpenStudy (raden):
yup, hehe :)
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