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

Essay

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. $13.86$ minutes
b. $17.86$ minutes
c. $15.86$ minutes
d. $16.86$ minutes
e. $14.86$ minutes