SOLUTION: A multiple choice test consists of six questions, each of which has five choices. Each question has exactly one correct answer. William guesses randomly at each answer. What is

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Question 984110: A multiple choice test consists of six questions, each of which has five choices. Each question has exactly one correct answer.
William guesses randomly at each answer. What is the probability that he gets four or fewer questions correct? (Round your answer to four decimal places.)

Answer by reviewermath(1029) About Me  (Show Source):
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A multiple choice test consists of six questions, each of which has five choices. Each question has exactly one correct answer.
William guesses randomly at each answer. What is the probability that he gets four or fewer questions correct? (Round your answer to four decimal places.)
Solution:
Using TI calculator, we have:
P(X ≤ 4 ) =binomcdf(6, 0.2, 4) =highlight%280.9984%29