After a long period of time, it is observed that the average number of phone calls at a desk in a 30 minute period is 3. Find the probability that: (O Exactly 2 calls are received in a random 30 min period; (i) At least 3 phone calls are received in a 10 min period; (if) At most 3 phone calls are received in a 1 hour period.

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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After a long period of time, it is observed that the average number of
phone calls at a desk in a 30 minute period is 3.
Find the probability that:
(i)
Exactly 2 calls are received in a random 30 min period;
(i)
At most 3 phone calls are received in a 1 hour period.
At least 3 phone calls are received in a 10 min period;
(if)
Transcribed Image Text:After a long period of time, it is observed that the average number of phone calls at a desk in a 30 minute period is 3. Find the probability that: (i) Exactly 2 calls are received in a random 30 min period; (i) At most 3 phone calls are received in a 1 hour period. At least 3 phone calls are received in a 10 min period; (if)
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