The number of days (X) after mailout it takes a utility company to receive payment for a customer’s bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days. The probability is 0.997 that a bill will be received between which of the following number of days?

A (13, 49)

B (19, 43)

C (25, 37)

Answer rating: 100% (QA)

Mean is 31 and s is 6 For 09... View the full answer