7. There are four QA inspectors in a packaging factory. Each one is supposed to stamp the date of arrival on each package at the end of the line. James, who stamps 20% of the packages, fails to stamp the expiration date once in every 200 packages; Jessie, who stamps 60% of the packages, fails to stamp the expiration date once in every 100 packages. Leah, who stamps 15% of the packages, fails to stamp the expiration date once in every 100 packages; and Andre, who stamps 5% of the packages, fails to stamp the expiration date once in every 200 packages. If a customer complains that the date of arrival was not stamped on, what is the probability that it was inspected by Jessie?
7. There are four QA inspectors in a packaging factory. Each one is supposed to stamp the date of arrival on each package at the end of the line. James, who stamps 20% of the packages, fails to stamp the expiration date once in every 200 packages; Jessie, who stamps 60% of the packages, fails to stamp the expiration date once in every 100 packages. Leah, who stamps 15% of the packages, fails to stamp the expiration date once in every 100 packages; and Andre, who stamps 5% of the packages, fails to stamp the expiration date once in every 200 packages. If a customer complains that the date of arrival was not stamped on, what is the probability that it was inspected by Jessie?
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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Transcribed Image Text:7. There are four QA inspectors in a packaging factory. Each one is supposed to
stamp the date of arrival on each package at the end of the line. James, who
stamps 20% of the packages, fails to stamp the expiration date once in every 200
packages; Jessie, who stamps 60% of the packages, fails to stamp the expiration
date once in every 100 packages. Leah, who stamps 15% of the packages, fails to
stamp the expiration date once in every 100 packages; and Andre, who stamps 5%
of the packages, fails to stamp the expiration date once in every 200 packages. If a
customer complains that the date of arrival was not stamped on, what is the
probability that it was inspected by Jessie?
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