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MathematicsMathematics
16 February, 15:48

Edward has to take a seven -question multiple-choice quiz in his sociology class. Each question has four choices for answers, of which only one is correct. Assuming that Edward guesses on all seven questions, what is the probability that he will answer a) all seven questions correctly, b) exactly three questions correctly, c) at least three questions correctly.

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  1. J
    16 February, 16:16
    0
    I think the answer is c, at least three questions correctly because he wouldn't get all of them right and he can't a get perfect number, 3.
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