Question 87986: This is the last problem i need help on...
A professor gives a test with 100 true-false questions. If 60 or more correct is necessary to pass, what is the probability that a student will pass by random guessing?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A professor gives a test with 100 true-false questions. If 60 or more correct is necessary to pass, what is the probability that a student will pass by random guessing?
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It's a binomial problem with n=100, p=0.5, 60<=x<=100.
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Using a TI-83 calculator you would get:
1 - binomcdf(100,0.5,59) = 0.028
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This is the probability the student will get at least 60 correct.
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Cheers,
Stan H.
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