An ant is walking on a hexagon. At each step, he moves from the vertex on which he is standing to an adjacent vertex. After 8 steps, what is the probability that he is standing on the same vertex on which he began?
First to calculate probability, we have total number of restricted ways/total number of possibilities. Since he moves 8 steps, and there are only 2 possible locations adjacent to which he can go, there are 8^2 = 64 TOTAL possibilities.
There are 8 steps, and 5 other vertices in the hexagon to go from.
Maybe this information could get you started... :)