Question $2(0\mathrm{.}5555$ points$)$

A PERT$/$CPM activity has an optimistio time estimate of thme days, a most likely time estimate

of eight days, and a pessimistic time estimate of $10$ days. The expected time $($in days$)$ of this

activity is:

$7\mathrm{.}0.$

$7\mathrm{.}5$

B$.$O$.$

$8\mathrm{.}5.$

$100$