Neve Commercial Bank is the only bank in the town of York, Pennsylvania. On a typical Friday, an average of 12 customers per hour arrive at the bank to transact business.
There is one teller at the bank, and the average time requires to transact business is 3 minutes.
It is assumed that service times may be described by the negative exponential distribution.
A single line would be used, and the customer at the front of the line would go to the first available bank teller.
If a single teller is used: The average time in the line=_____ minutes (round your response to two decimal places).