In performing a symmetric approximation, you calculate a meanof the total system cost as $1,725K. The varianceis 22500. The POE is $1,600K. What is the probabilityof overrunning the POE?

50.56%

29.67%

83.33%

79.67%

In order to answer this question, it is necessary to make some assumption about the probability distribution function of the total system cost. We shall assume a normal distribution, since it’s the most common distribution used in this type of problem.

Let’s call X the total system cost. The problem asks us to find Prob(X > 1600) (i.e., the probability that the cost will be higher than 1600), knowing that …