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You randomly guess the answers to two questions on a multiple-choice test. Each question has three choices: A, B, and C. What is the probability that the answer is correct?

 Mar 17, 2020
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The answer for one of them, or the answer for two of them. For both answers to be correct, there is a 1 in 9 chance because 1/3*1/3 = 1/9.

But if you want to find the probability that one answer is right and the other is wrong is 1/3*2/3 which is 2/9. But, you have to multiply that by two because you can have the first right and the second wrong or the second right and the first wrong, so it is actually 4/9. Both answers right: 1/9, one answer right one answer wrong:4/9, Both right or one right one wrong:5/9

 Mar 17, 2020

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