Find the minimum score the instructor can set so that the


Question: A multiple choice exam has 20 questions; there are four choices for each question.

a. A student guesses the answer to every question. Find the chance that he guesses correctly between four and seven times.

b. Find the minimum score the instructor can set so that the probability that a student will pass just by guessing is 20% or less.

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Basic Statistics: Find the minimum score the instructor can set so that the
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