Suppose the Average Waiting Time for a Customer's Call to Be

Multiple Choice

Suppose the average waiting time for a customer's call to be answered by a company representative (modeled by exponentially decreasing probability density functions) is $20$ minutes. Find the median waiting time.

A) $16.86$ minutes
B) $17.86$ minutes
C) $13.86$ minutes
D) $14.86$ minutes
E) $15.86$ minutes