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a) Find the probability that the call is answered in 2 to 4 minutes. >) Find the probability that the call is answered in 5 minutes or less. c) Using the Complement Rule from probability theory and your answer to part (b), what is the probability that the waiting time is 5 minutes or more?

a) Find the probability that the call is answered in 2 to 4 minutes. >) Find the probability that the call is answered in 5 minutes or less. c) Using the Complement Rule from probability theory and your answer to part (b), what is the probability that the waiting time is 5 minutes or more?

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Suppose the average waiting time for a customer's call to be answered by a company repre- sentative is four minutes. Waiting times are often modeled by exponential random variables. If we apply this approach to this example, then the probability that the waiting time is between a and 6 minutes is given by the integral ·b [te е -t/4 dt (assuming a ≥ 0 and b ≥ a). (a) Find the probability that the call is answered in 2 to 4 minutes. (b) Find the probability that the call is answered in 5 minutes or less. (c) Using the Complement Rule from probability theory and your answer to part (b), what is the probability that the waiting time is 5 minutes or more?
Transcribed Image Text:Suppose the average waiting time for a customer's call to be answered by a company repre- sentative is four minutes. Waiting times are often modeled by exponential random variables. If we apply this approach to this example, then the probability that the waiting time is between a and 6 minutes is given by the integral ·b [te е -t/4 dt (assuming a ≥ 0 and b ≥ a). (a) Find the probability that the call is answered in 2 to 4 minutes. (b) Find the probability that the call is answered in 5 minutes or less. (c) Using the Complement Rule from probability theory and your answer to part (b), what is the probability that the waiting time is 5 minutes or more?
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