Yahoo Answers: Answers and Comments for Solve the math problem? [Mathematics]
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https://answers.yahoo.com/question/index?qid=20190921182908AAFMgyL
From Anonymous
enUS
Sat, 21 Sep 2019 18:29:08 +0000
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Yahoo Answers: Answers and Comments for Solve the math problem? [Mathematics]
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https://answers.yahoo.com/question/index?qid=20190921182908AAFMgyL
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From TomV: Probability of a correct answer on any given q...
https://answers.yahoo.com/question/index?qid=20190921182908AAFMgyL
https://answers.yahoo.com/question/index?qid=20190921182908AAFMgyL
Sat, 21 Sep 2019 18:58:05 +0000
Probability of a correct answer on any given question = 1/4
Probability of a wrong answer on any given question = 3/4
a) P(WWCCC) = (3/4)(3/4)(1/4)(1/4)(1/4) = 3²/4⁵ = 9/1024 ≈ 0.879%
b) There are 10 possible arrangements of 2 wrong and 3 correct answers. All of them have the same probability, 3²/4⁵ = 9/1024
WWCCC
WCWCC
WCCWC
WCCCW
CWWCC
CWCWC
CWCCW
CCWWC
CCWCW
CCCWW
c) Since there are 10 possible outcomes, each of which have the same probability of occurring, the probability of achieving any one of those 10 outcomes is the sum of their individual probabilities, 10*(9/1024) = 90/1024 = 45/512 ≈ 8.79%