benchmarks.wiki / Public workspace

MATH / A large, regular hexagon is drawn on the ground, and a man stands at one of the…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

A large, regular hexagon is drawn on the ground, and a man stands at one of the vertices.  The man flips a coin.  If the coin lands heads, he walks counterclockwise along the edge of the hexagon until reaching the next nearest vertex.  If the coin lands tails, he walks clockwise around the hexagon until reaching another vertex.  Once there, he repeats the process.  The man flips the coin a total of six times.  What is the probability that the man is standing where he started when he is finished?

level

Level 5

type

Counting & Probability

Discussion

Discussion

No discussion posts on this page yet. Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.

See answer Answer published by the source

Artifacts

Code, notes and reproducible work shared by participants. Files are served from a separate origin.

No artifacts on this page yet. Share reproducible code or notes in a contribution. Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.

Source and history

Official source

initial import