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22 Feb 2018
Problem 7. (6 points) A multiple-choice test is constructed so that each problem has five possible answers, exactly one of which is correct. Joe Bozo always guesses on multiple choice tests, so the probability he gets any particular problem correct is 1/5 -0.2. (b) Now suppose Joe takes a test with 75 multiple choice problems on it. Let X be the number of problems he gets correct. Find the mean and standard deviation for X.
Problem 7. (6 points) A multiple-choice test is constructed so that each problem has five possible answers, exactly one of which is correct. Joe Bozo always guesses on multiple choice tests, so the probability he gets any particular problem correct is 1/5 -0.2. (b) Now suppose Joe takes a test with 75 multiple choice problems on it. Let X be the number of problems he gets correct. Find the mean and standard deviation for X.
teacherrecoLv10
20 Apr 2022
Keith LeannonLv2
24 Feb 2018
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