Question

Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an average of $ 600 per month and a standard deviation of $50 per month. Refer to such expenses as PCE's (personal call expenses). Using the distribution above, what is the probability that during a randomly selected month PCE's were between $475.00 and $690.00 ?

Answer 1

The solution is attached in the picture below

Step-by-step explanation:

Answer 2

Answer: 0.9579

Step-by-step explanation:

See attached file