Eva, the Owner of Eva's Second Time Around Wedding Dresses

Eva, the owner of Eva's Second Time Around Wedding Dresses, currently has five dresses to be altered, shown in the order in which they arrived: $$\begin{array} { l c c } \text { Job } & \begin{array} { c } \text { Processing } \\\text { Time (hrs) }\end{array} & \begin{array} { c } \text { Due } \\\text { (hrs from now) }\end{array} \\\hline \mathrm { V } & 3 & 5 \\\mathrm {~W} & 1 & 1 \\\mathrm { X } & 4 & 9 \\\mathrm { Y } & 2 & 3 \\\mathrm { Z } & 5 & 7\end{array}$$ If Eva uses the shortest processing time first (SPT) priority rule to schedule these jobs, what will be the average completion time?

A) 3 hours
B) 5 hours
C) 7 hours
D) 7.2 hours
E) 8 hours

Correct Answer:

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