There is an antigen kit for COVID-19. If a person is infected, the kit will correctly report 989% of the time. If a person is not infected, the kit will incorrectly report that the person is infected 19% of the time. The kit is used in two communities called A and B. A and B differ in the percentage of the infected individuals. In A, 98% of the people have no virus. In B, 70% of the people have no virus. Alice lives in A. Bob lives in B. Both Alice and Bob use the antigen kit. They both have positive results. Compare their chances of actually having the virus.
There is an antigen kit for COVID-19. If a person is infected, the kit will correctly report 989% of the time. If a person is not infected, the kit will incorrectly report that the person is infected 19% of the time. The kit is used in two communities called A and B. A and B differ in the percentage of the infected individuals. In A, 98% of the people have no virus. In B, 70% of the people have no virus. Alice lives in A. Bob lives in B. Both Alice and Bob use the antigen kit. They both have positive results. Compare their chances of actually having the virus.
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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![There is an antigen kit for COVID-19.
If a person is infected, the kit will correctiy report 989% of the time.
If a person is not infected, the kit will incorrectly report that the person is infected 19% of the
time.
The kit is used in two communities called A and B.
A and B differ in the percentage of the infected individuals.
In A, 98% of the people have no virus. In B, 70% of the people have no virus.
Alice lives in A. Bob lives in B. Both Alice and Bob use the antigen kit. They both have
positive results. Compare their chances of actually having the virus.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F28e6ece8-c0e3-44e8-ab8e-27b7c9c4111b%2F6014dd9b-fb30-4786-babe-0e03ffe09eb5%2F0bo7uoi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:There is an antigen kit for COVID-19.
If a person is infected, the kit will correctiy report 989% of the time.
If a person is not infected, the kit will incorrectly report that the person is infected 19% of the
time.
The kit is used in two communities called A and B.
A and B differ in the percentage of the infected individuals.
In A, 98% of the people have no virus. In B, 70% of the people have no virus.
Alice lives in A. Bob lives in B. Both Alice and Bob use the antigen kit. They both have
positive results. Compare their chances of actually having the virus.
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