+210 If the famous baseball player for the San Francisco Midgets, Larry Ponds, has a chance of earning a walk on each plate appearance, what is the probability that he will earn a walk exactly once in his next two plate appearances? Express your answer as a common fraction.
+210 The answer is 12/25, because he can either be walked on the first appearence or the second. In both of those cases, there is a 2/5 probability that he is walked, and then a 3/5 probability that he is not walked. So, the final answer is (3/5*2/5)+(3/5*2/5) = 12/25.
