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OpenStudy (anonymous):
The community 10K run/walk event awards ribbons to the top four finishers in each age category. If 20 people in the 15-19 age range register for the race, how many ways are there to arrange the top four finishers?
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OpenStudy (anonymous):
@Brostep0s
OpenStudy (anonymous):
20C4=20*19*18*17/2*3*4
OpenStudy (anonymous):
What about the answer bit?
OpenStudy (anonymous):
20C4=20*19*18*17/2*3*4=4845 possible arrangements.
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