Question: 5. A multiple-choice examination has 6 questions. Each question has ve possible answers, only one of which is correct. The student can eliminate 3 incorrect

5. A multiple-choice examination has 6 questions. Each question has ve possible answers, only one of which is correct. The student can eliminate 3 incorrect answers and chooses at random between remaining answers. (a) (5 points) What is the expected number of the questions that the student will an swer correctly? (b) (5 points) What is the standard deviation of the number of correct answers? (c) (5 points) What is the probability that the student answers at least 5 questions correctly

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