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Mathematics 15 Online
OpenStudy (anonymous):

There are 25 people competing in a race. In how many ways can they finish in first and second place 49 400 600 625

OpenStudy (raden):

there are 25 ways in first, surely there are 24 ways in the second place. so, the total way is = 25 * 24 = ... ways

OpenStudy (anonymous):

thank you!

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