re are 20 errors common to both people. Assume that nd also that the discovery of an error by one person is r by the other person. Given these assumptions, rougl our answer will be an integer, so write your answer as

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 87E
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Two people proofread the same book. One person finds 100 errors while the second finds 60
errors. There are 20 errors common to both people. Assume that all errors are equally likely to
be found, and also that the discovery of an error by one person is independent to the discovery
of that error by the other person. Given these assumptions, roughly how many errors does the
book have?
Note that your answer will be an integer, so write your answer as such (i.e. your answer should
only contain digits. Do NOT include any other characters)
Transcribed Image Text:Two people proofread the same book. One person finds 100 errors while the second finds 60 errors. There are 20 errors common to both people. Assume that all errors are equally likely to be found, and also that the discovery of an error by one person is independent to the discovery of that error by the other person. Given these assumptions, roughly how many errors does the book have? Note that your answer will be an integer, so write your answer as such (i.e. your answer should only contain digits. Do NOT include any other characters)
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