Question

You call the Treasury trying to solve your problem with the payment of the economic incentive....

You call the Treasury trying to solve your problem with the payment of the economic incentive. The time you have to let the phone ring for you to be attended follows an exponential distribution with an average of 35 minutes

a) If your next virtual meeting is 20 minutes, what is the probability that they will answer your call before you have to hang up?

b) If yesterday you were 40 minutes on the phone and you did not get any attention, what is the probability that today you will be seen in less than 20 minutes?

c) How long do the 10% of people who wait less wait?

d) If 200 people call for help during a day, what is the probability that the average waiting time for the 200 is less than 30 minutes?

Math   Statistics-And-Probability   
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