Question 1083079
For this particular problem, it can be solved quickly, as follows:
{{{P(60<X<95 )}}}
={{{P(X<95)-P(X<60)}}}
={{{P(X>55)-P(X>90)}}} ..... recall that mean=75, and normal distr. is symm about mean
={{{P(55<X<60)+P(X>60)-0.0661}}}
={{{0.0441+(1-P(X>90))-0.0661}}}
={{{0.0441+(1-0.0661)-0.0661}}}
={{{0.9119}}}


A more general way is to solve for the standard deviation, and solve accordingly.  Standard deviation will be found to be 9.9639.