A multiple-choice quiz has 15 questions, each with 4 possible answers of which only 1 is the correct answer. Suppose a student has been absent for the past meetings and has no idea what the quiz is all about. The student simply uses a randomization mechanism (e.g. using eeny, meeny miny, mo) in answering each item. What is the probability that the student will get at least 3 correc

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section: Chapter Questions
Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...
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A multiple-choice quiz has 15 questions, each with 4 possible answers of which only 1 is the
correct answer. Suppose a student has been absent for the past meetings and has no idea what the
quiz is all about. The student simply uses a randomization mechanism (e.g. using eeny, meeny
miny, mo) in answering each item.

What is the probability that the student will get at least 3 correct answers?

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If the passing grade is 9 correct answers, what is the probability that the student will fail?

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