Question 1161230
this is z=(x-mean)/sd where for a z>(1740-1650)/60=1.5
probability z> 1.5 is 0.0668

<1600 is z<-50/60 for probability of 0.2023

c=0.6760
Can use the calculator here with 2 VARS normalcdf (1600,1720,1650,60) ENTER.  Notice how it is ordered.