2006 AMC 10A Problems/Problem 25
Revision as of 01:58, 6 July 2006 by Ignite168 (talk | contribs) (2006 AMC 10A Problem 25 moved to 2006 AMC 10A Problems/Problem 25)
Problem
A bug starts at one vertex of a cube and moves along the edges of the cube according to the following rule. At each vertex the bug will choose to travel along one of the three edges emanating from that vertex. Each edge has equal probability of being chosen, and all choices are independent. What is the probability that after seven moves the bug will have visited every vertex exactly once?