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Heres how you solve grid problems

Ever have been stuck on problems like, in how many ways can a mouse go from a to b on a 5 by 3 grid, only going right or up? here's how you do it: no matter what you do, you have to go 5 sideways, and 3 up to reach your destination. so, all you have to do is choose 5 out your 8 steps to be sideways, so it is 8 choose 5 or 8 choose 3, where you choose 3 steps to go up

Note by Evan Li
1 year, 11 months ago

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Thank you. This really helped me. Beyond Imagination · 1 year, 11 months ago

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