SOLUTION: A statistics professor decides to give a final exam that has only 12 true-false questions. Suppose a student taking that exam guesses on every question. Let X represent the numbe

Question 728970: A statistics professor decides to give a final exam that has only 12 true-false questions. Suppose a student taking that exam guesses on every question. Let X represent the number of questions the student gets correct on the exam. Explain why X can be considered a binomial random variable.
If the student must answer at least 70% of the questions correctly to pass the exam, what is the minimum number of questions the student must answer correctly to pass, and what is the associated probability?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
70% of 12 is 8.4
so he must get at least 9 correct which is really 75%.

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