SOLUTION: a student takes an exam containing 10 multiple choice questions. The probability of choosing a correct answer by knowledgeable guessing is 0.2 At least 6 correct answers are requir

Question 857278: a student takes an exam containing 10 multiple choice questions. The probability of choosing a correct answer by knowledgeable guessing is 0.2 At least 6 correct answers are required to pass. If a student makes knowledgeable guesses, what is the probability that he will fail?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

p(guessing correctly) = .2,  n = 10

P(x < 6) = 1 -  binomcdf(10, .2, 5) = .9672     |TI syntax is 1 � binomcdf(n, p, largest x-value) 

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