Question $17$

$4$ pts

For a construction project, the expected project completion time is $18$ weeks, with a standard deviation of $0\mathrm{.}5$ weeks. What is the probability that the construction project will be completed before $19$ weeks?

$95\%$

$100\%$

$90\%$

$85\%$

$97\mathrm{.}7\%$