Question: Section 6 (Poisson & Exponential distributions) Kelly receives a text message in every 20 minutes on average during the daytime. Assume that the time between

Section 6 (Poisson \& Exponential distributions) Kelly receives a text message in every 20 minutes on average during the daytime. Assume that the time between two text messages follows an exponential distribution and the number of text messages follows a Poisson distribution. Use this case for questions from 21 to 25. What is the probability that Kelly receives no text messages for an hour? (4 pt.) 0.6331 0.9999 0.3254 0.0498
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