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Mathematics, 11.11.2020 04:50 srshelton

A student is taking a 10 question multiple choice test that has five options for each question (A, B, C, D, and E). Suppose a student knows the correct answer to 6 of the questions. For the remaining 4 questions, the student can
eliminate one response per question, on average.
What is the probability the student gets at least an 80% on the test?

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