SOLUTION: Suppose the quiz consists of 20 true - false questions.a student hasn't studied for the exam and will just be randomly guessing at all answers (with true and false equally likely).

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Question 1201477: Suppose the quiz consists of 20 true - false questions.a student hasn't studied for the exam and will just be randomly guessing at all answers (with true and false equally likely). Explain how to find the probability that the student guess 8 or fewer answers correct.( just Explain the process)

Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


P(8 correct) = C%2820%2C8%29%2F2%5E20
P(7 correct) = C%2820%2C7%29%2F2%5E20
.
.
.
P(1 correct) = C%2820%2C1%29%2F2%5E20
P(0 correct) = C%2820%2C0%29%2F2%5E20

P(8 or fewer correct): Add the above probabilities