SOLUTION: A student randomly guesses at 7 multiple choice questions. Each question has 5 possible choices. What is the probability that the student gets exactly 1 correct?
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Question 364396: A student randomly guesses at 7 multiple choice questions. Each question has 5 possible choices. What is the probability that the student gets exactly 1 correct? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! 1/5=.2 probability he guesses correctly.
Let x=0.2 and y=0.8
(x+y)^7
7x^1y^6=.367 probability that the student gets exactly 1 correct.
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Ed
