A new phone system was installed last year to help reduce the expense of personal calls that were being made byemployees. Before the new system was installed, the amount being spent on personal calls followed a normaldistribution with an average of $400 per month and a standard deviation of $50 per month. Refer to such expenses asPCE's (personal call expenses). Using the distribution above, what is the probability that a randomly selected month hada PCE of between $275 and $490? Round to four decimal places.OA. 0.9579OB. 0.9999OC. 0.0421OD. 0.0001...

Question

Accepted Answer

Given 
Population mean μ=400, standard deviations σ=50