SOLUTION: In a pop quiz consisting of three true-false question,and supposed that the student blindly guesses the answer. {{{highlight(Determine_the_probability_that)}}} a) exactly

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Question 1200839: In a pop quiz consisting of three true-false question,and supposed that the student blindly guesses the answer.

highlight%28Determine_the_probability_that%29

a) exactly two highlight%28cross%28questions%29%29 answers are correct?
b) exactly one highlight%28cross%28question%29%29 answer is correct?
c) at least two highlight%28cross%28questions%29%29 answers are correct?
d) at least one highlight%28cross%28question%29%29 answer is correct?
Answer by ikleyn(52775) About Me  (Show Source):
You can put this solution on YOUR website!
.

(a)  C%5B3%5D%5E2%2A%281%2F2%29%5E2%2A%281%2F2%29 = 3%2F8.    ANSWER


(b)  C%5B3%5D%5E1%2A%281%2F2%29%2A%281%2F2%29%5E2 = 3%2F8.     ANSWER


(c)   C%5B3%5D%5E2%2A%281%2F2%29%5E2%2A%281%2F2%29+%2B+C%5B3%5D%5E3%2A%281%2F8%29 = 3%2F8%2B1%2F8 = 4%2F8 = 1%2F2.    ANSWER


(d)  complement to "no one answer is correct"   1 - 1%2F8 = 7%2F8.    ANSWER

Solved.

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