In the very large lecture class CHEM [115, 85% of students passed the first exam. I want

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In the very large lecture class CHEM [115, 85% of students passed the first exam. I want to start a study group for students who failed the first test, with 10 students in the group. Because of FERPA privacy laws, I'm not allowed to get this information from the instructor. In surveying CHEM 115 students, let X be the number I have to interview to find 10 who failed the first exam. What are the expected value and standard deviation of X?
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Introduction to Probability

ISBN: 978-0716771098

1st edition

Authors: Mark Daniel Ward, Ellen Gundlach

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