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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.

 Aug 13, 2018
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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.

 Aug 13, 2018

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