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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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Can you solve it by playing attention to what's in the parent brackets?
A local public-action group solicits donations by telephone. For a particular list of prospects, it was estimated that for any individual
the probability was 0.05 of an immediate donation by credit card, 0.29 of no immediate donation but a request for further
information through the mail, and 0.66 of no expression of interest. Information is mailed to all people requesting it, and it is
estimated that 30% of these people will eventually donate. An operator makes a sequence of calls, the outcomes of which can be
assumed to be independent. What is the probability that the first call leading to any donation (either immediately or eventually after
a mailing) is preceded by at least five calls that never lead to a donation? (Round to three decimal places as needed)
Transcribed Image Text:A local public-action group solicits donations by telephone. For a particular list of prospects, it was estimated that for any individual the probability was 0.05 of an immediate donation by credit card, 0.29 of no immediate donation but a request for further information through the mail, and 0.66 of no expression of interest. Information is mailed to all people requesting it, and it is estimated that 30% of these people will eventually donate. An operator makes a sequence of calls, the outcomes of which can be assumed to be independent. What is the probability that the first call leading to any donation (either immediately or eventually after a mailing) is preceded by at least five calls that never lead to a donation? (Round to three decimal places as needed)
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