You're trapped in a maze. There is a way out. Path junctions are all 3-way.
If you use the strategy of always taking the path going right, what will happen?
(Note: This problem is deliberarely vague.)
(In reply to
I'm not getting something. by Charlie)
Going right implies a 2 dimensional junction, but not necessarily a 2d maze. Think of it as an underground maze made of tunnels and rooms..
In the quoted text, "Each possibility" represents a single segment, not an entire path. Finding the exit segment vs the initial segment is made random due to the unknown maze structure, yielding 1/2 chance for each.
re: I'm not getting something.
