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Moving only south and east along the line segments, how many paths are tehre from A to B? If you can explain using combinaations and permutations, it would be AWESOME! TANKS SO MUCH!!!

 Jul 11, 2020
 #1
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please help, i have to teach my brother how to do this after. thanks

 Jul 11, 2020
 #2
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There are C(9,3) = 84 paths, but you have to subtract 2 because of the two missing segments.  That leads to 84 - 2 = 82 paths.

 Jul 11, 2020

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