The Average Number of Jobs in the Work Center for Jobs

Multiple Choice

The average number of jobs in the work center for jobs listed in the following table under the shortest processing time (SPT) rule is ______. $$\begin{array} { | c | c | c | } \hline \text { Job } & \begin{array} { c } \text { Processing time } \\\text { (in days\} }\end{array} & \begin{array} { c } \text { Due date (in days from } \\\text { today's date\} }\end{array} \\\hline \text { A } & 4 & 9 \\\hline \text { B } & 10 & 18 \\\hline \text { C } & 6 & 6 \\\hline \text { D } & 12 & 19 \\\hline \text { E } & 7 & 17 \\\hline\end{array}$$

A) 2.49 jobs
B) 2.98 jobs
C) 3 jobs
D) 3.5 jobs