Question 137289
You are given a multiple choice test consisting of 10 questions. Each question has 4 choices. If you quess at all of the answers, what is the probability that you will choose the incorrect answer for each question? My answer is: 
4 * 10 = 40 40/10 = 4%
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P(wrong answer on one question) = 3/4
P(wrong answer on all ten questions) = (3/4)^10 = 0.0563
which is a little more than 5%
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Cheers,
Stan H.