HMMT November 2014 U15
- Guts
- Answer
Carl is on a vertex of a regular pentagon. Every minute, he randomly selects an adjacent vertex (each with probability ) and walks along the edge to it. What is the probability that after 10 minutes, he ends up where he had started?
Dataset text NuminaMath olympiads. Quoted with source.
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\frac{127}{512}
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