SOLUTION: In how many ways can 5 letters be chosen from {D,E,F,G,H,I,J,K} , assuming that the order of the choices doesn't matter and that repeats are not allowed?

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Question 965930: In how many ways can 5 letters be chosen from {D,E,F,G,H,I,J,K} , assuming that the order of the choices doesn't matter and that repeats are not allowed?
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!

8 letters, choose 5 = 8C5 = 8%21%2F%285%21%288-5%29%21%29=8%21%2F%285%213%21%29=40320%2F%28120%2A6%29=56 ways