SOLUTION: suppose you have a 9 questions multiple choice test with 3 possible answers. also suppose you guess on each question. what would the probability of 0, 1, 2, 3,4,5,6,7,8,9, would be
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Question 385027: suppose you have a 9 questions multiple choice test with 3 possible answers. also suppose you guess on each question. what would the probability of 0, 1, 2, 3,4,5,6,7,8,9, would be?? round four decimals places
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
suppose you have a 9 questions multiple choice test with 3 possible answers. also suppose you guess on each question. what would the probability of 0, 1, 2, 3,4,5,6,7,8,9, would be?? round four decimals places
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Binomial Problem with n = 9 and p = 1/3
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If k is any one of those numbers you listed,
P(x = k) = 9Ck*(1/3)^k*(2/3)^(9-k)
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Example:
P(x = 3) = 9C3*(1/3)^3*(2/3)^6 = 0.2731
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cheers,
Stan H.
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