back to assignment attempts keep the highest no score out of 5/ 5 2. expected value and variance of a discrete random variable mark derosa, a major league baseball player, was a second baseman for the chicago cubs in 2007. consider the experiment of derosa making a batting appearance. there are five experimental outcomes: he is out, he advances to first base, he hits a double, he hits a triple, or he hits a home run. define the random variable x as the number of bases that derosa advances on the baseball diamond from his batting appearance. thus, the values of x are: x