Patrons Line Up to Spin the Giant Slot Machine at the Entrance

Multiple Choice

Patrons line up to spin the giant slot machine at the entrance to Ace Rothstein's Tangiers casino. They pour in the door at the rate of 300 per hour and it takes exactly ten seconds every time for the wheels to spin and inform the unlucky patron that they have lost a dollar rather than win a new Corvette. How many customers are in line on average?

A) 2.08 customers
B) 1.93 customers
C) 1.67 customers
D) 1.50 customers