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Mathematics, 03.12.2019 01:20 2005briana

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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