The drainage from a community during a storm is a normal random variable. The estimated mean flow rate is 1.7 mgd and has a standard deviation of 0.25 mgd. If the drainage system's maximum storm...

The drainage from a community during a storm is a normal random variable.  The estimated mean flow rate is 1.7 mgd and has a standard deviation of 0.25 mgd.  If the drainage system's maximum storm design drainage capacity is 1.9 mgd, what is the probability of flooding during a storm?