All South Carolina bound passengers at the Detroit Metro Airport check in and are directed to the main security gate (checkpoint #1). About 10% of the passengers who are directed to checkpoint #1 DO NOT get in line. Rather they proceed to an alternate checkpoint for security clearance. If the average line at checkpoint #1 has 100 people in it and if on average, 650 per hour arrive at checkpoint #1, then how long (in minutes) do those staying at checkpoint #1 wait in line?
a. 10.26 minutes
b. 8.39 minutes
c. 5.13 minutes
d. 9.23 minutes