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Find the number of paths from A to I, if each step must be in a right-ward direction.  (For example, one possible path is ABCEFHI.)

 

 Oct 6, 2023
 #1
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To count the number of paths from A to I, we can count the number of ways to choose 6 of the 7 letters B, C, D, E, F, G, H. There are (67​)=7​ ways to do this.

 Oct 6, 2023

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