A rat runs a certain T maze, which is set so that if the rat turns left, it is rewarded with probability 0.8 and if the rat turns right, it is rewarded with probability of 0.3. On the first try, the rat has equal probabilities of turning either left or right. On all succeeding trials, the rat will turn in the direction it did on the preceding trial with probability of 0.9 if it was rewarded. If the previous trial was not rewarded, the rat will turn in the opposite direction with probability of 0.6. The rat runs two trials. Let Y = the number of left turns. Assign probabilites and y values to each path. Solution hope this helps. http://www.ratbehavior.org/RatsAndMazes.htm.