SOLUTION: A multiple-choice quiz has 15 questions, each with 4 possible answers of which only one is correct. What is the probability that a student gets at least 1 correct answer?

Question 1152862: A multiple-choice quiz has 15 questions, each with 4 possible answers of which only one is correct. What is the probability that a student gets at least 1 correct answer?
Answer by ikleyn(52814) (Show Source): You can put this solution on YOUR website!
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For each of 15 questions, the probability to guess randomly the correct answer is .


The probability to answer incorrectly all 15 questions is   = 0.013363


The probability to get at least 1 correct answer is the COMPLEMENT


    P = 1 -  = 1 - 0.013363 = 0.986637.    ANSWER

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