A sales manager receives 6 calls on average between 9:30 a.m. and 10:30 a.m. on a weekday. Find the probability that: a) he will receive 2 or more calls between 9:30 a.m. and 10:30 a.m. on a certain weekday. b) he wiI1 receive exactly 2 calls between 9:30 a.m. and 9:40 a.m. on a certain weekday. c) during a 5 day working week, there will be exactly 3 days on which he will receive no calls between 9:30 a.m. and 9:40 a.m.

A sales manager receives 6 calls on average between 9:30 a.m. and 10:30 a.m. on a weekday. Find the probability that: a) he will receive 2 or more calls between 9:30 a.m. and 10:30 a.m. on a certain weekday. b) he wiI1 receive exactly 2 calls between 9:30 a.m. and 9:40 a.m. on a certain weekday. c) during a 5 day working week, there will be exactly 3 days on which he will receive no calls between 9:30 a.m. and 9:40 a.m.

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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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

Q2.

A sales manager receives 6 calls on average between 9:30 a.m. and 10:30 a.m. on a weekday.
Find the probability that:

a) he will receive 2 or more calls between 9:30 a.m. and 10:30 a.m. on a certain weekday.

b) he wiI1 receive exactly 2 calls between 9:30 a.m. and 9:40 a.m. on a certain weekday.

c) during a 5 day working week, there will be exactly 3 days on which he will receive no
calls between 9:30 a.m. and 9:40 a.m.

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