Question $8$

A project has a critical path with a duration of $20$ weeks and a standard deviation of $4$ weeks. There is a $35\%$ chance the project will be completed in $x$ weeks or less. What is $x?$ Select the closest answer.

$18\mathrm{.}4$

$15\mathrm{.}8$

$21\mathrm{.}6$

$24\mathrm{.}2$

$19\mathrm{.}7$