2. The time between incoming phone calls at a call center is a random variable with exponential density. There is a 50% probability of waiting 20 seconds or more between calls. Determine the value of r in the exponential density function and then find the average time between calls at this call center. Finally, determine the probability that a call will come in between 30 and 40 seconds after another call.

2. The time between incoming phone calls at a call center is a random variable with exponential density. There is a 50% probability of waiting 20 seconds or more between calls. Determine the value of r in the exponential density function and then find the average time between calls at this call center. Finally, determine the probability that a call will come in between 30 and 40 seconds after another call.

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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