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A multiple choice examination has 5 ques...

A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. The probability that a student will get 4 or more correct answers just by guessing is (1) `(13)/(3^5)` (2) `(11)/(3^5)` (3) `(10)/(3^5)` (4) `(17)/(3^5)`

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