(adsbygoogle = window.adsbygoogle || []).push({}); 1. The streets of a city are laid out in a rectangular gird, as shown below

a) Use combinations to find the number of routes through the grid that lead from point A to point B by only travelling north or east. Show your calculations

b) How many of these routes pass through intersections C

2. Alright, so I've solved similar questions before. I get to P(66,6)/6! only to get some absurd answer. I understand that from point A to point B there is a distance of 66 blocks-11 east, 6 north. Somehow I believe that the exponential answer that comes from this is not what my professor expects.

I was wondering if I could have help with this please and thank you :D

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# Homework Help: Grids and Pascal's Triangle

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