SOLUTION: I am going to choose 6 students out of the 15 who currently have A's to be mentors for the students who have C's or lower. How many ways can a group of 6 be selected?

Question 146044: I am going to choose 6 students out of the 15 who currently have A's to be mentors for the students who have C's or lower. How many ways can a group of 6 be selected?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
choose 6 students out of the 15 who currently have A's to be mentors for the students who have C's or lower. How many ways can a group of 6 be selected?
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Ans: 15C6 = 15!/[(15-6)!*6!] = 15!/[9!*6!] = [15*14*13*12*11*10]/[1*2*3*4*5*6]
= 5005
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Cheers,
Stan H.
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