In a multiple-choice exam, you have an unlimited supply of questions, in which a correct answer fetches you 4 points a wrong answer has a penalty of 1 mark. If you randomly select one of the four options available for each question, what is the minimum number of questions you have to try to make sure you are 99 percent sure to get marks above 20? Select one: 556 None of these x 667 334 I do not want to attempt

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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In a multiple-choice exam, you have an unlimited supply of questions, in which a correct answer fetches you 4
points a wrong answer has a penalty of 1 mark. If you randomly select one of the four options available for
each question, what is the minimum number of questions you have to try to make sure you are 99 percent
sure to get marks above 20?
Select one:
556
None of these x
667
334
I do not want to attempt
Transcribed Image Text:In a multiple-choice exam, you have an unlimited supply of questions, in which a correct answer fetches you 4 points a wrong answer has a penalty of 1 mark. If you randomly select one of the four options available for each question, what is the minimum number of questions you have to try to make sure you are 99 percent sure to get marks above 20? Select one: 556 None of these x 667 334 I do not want to attempt
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