Question has four possible answers

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Christie is taking a multiple-choice test in which each question has four possible answers. She knows the answers to 40% of the questions and can narrow the choices down to two answers 40% of the time. If she knows nothing about the remaining 20% of the questions and merely guesses the answers to these questions, what is the probability that she will correctly answer a question chosen at random from the test?

Reference no: EM131826907

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