SOLUTION: On a 9 question multiple-choice test, where each question has 3 answers, what would the probability of getting at least 1 question wrong?
Answer as a fraction
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Answer as a fraction
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Question 1182167: On a 9 question multiple-choice test, where each question has 3 answers, what would the probability of getting at least 1 question wrong?
Answer as a fraction Answer by ikleyn(52799) (Show Source):
You can put this solution on YOUR website! .
On a 9 question multiple-choice test, where each question has 3 answers,
what would the probability of getting at least 1 question wrong?
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Since each question has 3 (three) optional answers, the probability to guess randomly a correct answer
is for each question.
For 9 questions, the probability to answer all 9 questions correctly, making random guess, is = .
The probability of getting at least 1 question wrong is the COMPLEMENT to it
P = 1 - = 1 - = . ANSWER
