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SUBMIT YOUR IDEALike a lot of solutions, this one leans into a bit of a brute force approach. Fortunate piece is that once you work through the first 2, you just copy paste for next 2, then copy those 4 and paste the next 4, couple modifications after paste and done, so not too tedious to build. It runs fast, I can say that.
I calculated probabilities for each path through the plinko board, but it's been a while since I calculated relative probabilities so this is based on my best understanding of the instructions :)
Genuinely might be my worst solution yet - but we move