SOLUTION: A test consists of 6 multiple choice questions, each having 5 possible answers, one of which is correct. Assume that you guess the answers to all 6. Find the probability of getting
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Question 1099939: A test consists of 6 multiple choice questions, each having 5 possible answers, one of which is correct. Assume that you guess the answers to all 6. Find the probability of getting less than 2 correct. Answer by htmentor(1343) (Show Source):
You can put this solution on YOUR website! This is a binomial probability problem with 6 trials and P(success) = 0.2
P(0) = C(6,0)*0.2^0*0.8^6 = 0.262
P(1) = C(6,1)*0.2^1*0.8^5 = 0.393
Therefore the probability of getting less than 2 correct is 0.393 + 0.262 = 0.655
