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OpenStudy (anonymous):
There are 25 people competing in a race. In how many ways can they finish in first and second place?. I will fan AND give medal if you help!
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OpenStudy (shamim):
25P2
OpenStudy (shamim):
its permutation
OpenStudy (anonymous):
Thank you
OpenStudy (shamim):
u r most welcome
OpenStudy (mrnood):
25 options for 1st then 24 options for 2nd
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