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Mathematics 9 Online
OpenStudy (anonymous):

Twenty students are in the final for a Math Olympiad. How many ways can they finish in first, second, and third

OpenStudy (anonymous):

hey i dont even get the ques. its too confusing about different thinking ways

OpenStudy (rock_mit182):

Id like to know the answer too..

OpenStudy (anonymous):

I wonder if permutation can help with this problem?

OpenStudy (rock_mit182):

i would guess is 20 * 19 * 18 but the reason is not evident to me..I mean conceptually

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