Fast Food Restaurants Pride Themselves in Being Able to Fill

Multiple Choice

Fast food restaurants pride themselves in being able to fill orders quickly. A study was done at a local fast food restaurant to determine how long it took customers to receive their order at the drive-thru. It was discovered that the time it takes for orders to be filled is exponentially distributed with a mean of 1.5 minutes. What is the probability that it takes less than one minute to fill an order?

A) 0.1813
B) 0.4866
C) 0.6321
D) 0.7769