SOLUTION: A multiple-choice test has 6 questions. Each question has 5 choices and only one of which is correct. If a
student guesses the answer for each question find the probability that t
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student guesses the answer for each question find the probability that t
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Question 1137149: A multiple-choice test has 6 questions. Each question has 5 choices and only one of which is correct. If a
student guesses the answer for each question find the probability that the students gets exactly 3 questions correct Answer by ikleyn(52781) (Show Source):
The probability to guess randomly the correct answer for each question is .
The probability to guess correctly 3 fixed questions of 5 is .
But there are = = 10 ways to select these 3 questions among the given 5.
So, the final probability is P = = 0.04627 = 4.627%.
