A project being analyzed by PERT has $60$ activities, $13$ of which are on the critical path. If the estimated time along the critical path is $210$ days with a project variance of $64,$ what is the probability that the project will take less than $220$ days to complete?

Normal Curve Areas.pdf

Group of answer choices

$1\mathrm{.}25$

$0\mathrm{.}10565$

$0\mathrm{.}89435$

$0\mathrm{.}56208$

$0\mathrm{.}84134$