A multiple-choice exam consists of 10 questions, each having 5 possible answers. To pass, you must answer at least 6 out of 10 questions correctly. What is the chance of this, if: You go into the exam without knowing a thing, and have to resort to pure guessing? You have studied enough so that on each question, 3 choices can be eliminated. But then you have to make a pure guess between the remaining 2 choices. You have studied enough so that you know for sure the correct answer on 3 questions. For the remaining 6 questions you have to resort to pure guessing

A multiple-choice exam consists of 10 questions, each having 5 possible answers. To pass, you must answer at least 6 out of 10 questions correctly. What is the chance of this, if: You go into the exam without knowing a thing, and have to resort to pure guessing? You have studied enough so that on each question, 3 choices can be eliminated. But then you have to make a pure guess between the remaining 2 choices. You have studied enough so that you know for sure the correct answer on 3 questions. For the remaining 6 questions you have to resort to pure guessing

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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