A student takes a multiple-choice exam, where each question has five possible answers. At the end of the exam, she answered all questions except three questions, for which she picks answers randomly. What is the probability that she got only a question correct?

A student takes a multiple-choice exam, where each question has five possible answers. At the end of the exam, she answered all questions except three questions, for which she picks answers randomly. What is the probability that she got only a question correct?

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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