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Marvin the fly starts at $(0,0).$ Each step, Marvin moves one unit right or one unit up. He is trying to get to the point $(5,7)$. However, at $(4,3)$ there is a frog that will eat him if he goes through that point. In how many ways can Marvin reach $(5,7)$?
 

 Jan 24, 2021
 #1
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I think the answer is 782 routes (and I think this is also a homework problem.

 Jan 24, 2021

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