SOLUTION: A professor assigns 25 homework problems, of which 10 will be graded. How many different sets of 10 problems can the professor choose to grade?
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Question 1017674: A professor assigns 25 homework problems, of which 10 will be graded. How many different sets of 10 problems can the professor choose to grade?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
25 chosen 10 at a time, or
nCr(25,10) (on your calculator)
That equals
25! / ((25-10)!*10!) = 3268760
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