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An unprepared student makes random guesses for the ten true or false questions on a quiz.find the probablity that there is at least one correct answer.

  • math -

    prob that he will get all of the wrong
    = (1/2)^10 = 1/1024

    so prob that he will get at least one correct
    = 1 - 1/1024 = 1023/1024

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