Mathematics, 28.02.2020 02:09 sgillespie006p3ute8
There are n questions on a multiple choice exam, and for each question, there are four choices. To pass the exam, one must correctly answer at least 70% of the questions. The student has not studied, so he/she has to resort to guessing on every question.
a. Find the probability of the student passing for n = 10.b. Find the expected number of questions answered correctly for n = 20.c. Find the variance for the number of questions answered correctly for n = 10.
Answers: 3
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There are n questions on a multiple choice exam, and for each question, there are four choices. To p...
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