A telephone exchange receives, on average, 5 calls per minute. Find the probability(i) that in a 1-minute period no calls are received; ...(ii) that in a 2-minute period fewer than 4 calls are received;(iii) that in a 20-minute period no more than 102 calls are received;(iv) that out of five separate 1-minute periods there are exactly four in which 2 or more callsare received.

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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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A telephone exchange receives, on average, 5 calls per minute. Find the probability (i) that in a 1-minute period no calls are received; (ii) that in a 2-minute period fewer than 4 calls are received; (iii) that in a 20-minute period no more than 102 calls are received;