A multiple choice examination has 5 questions. Each question has three alternative answer…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
A multiple choice examination has 5 questions. Each question has three alternative answer of which exactly one is correct. The probability that a student will get 4 or more correct answers just by guessing is:
- \(\frac{17}{3^{5}}\)
- \(\frac{13}{3^{5}}\)
- \(\frac{11}{3^{5}}\)
- \(\frac{10}{3^{5}}\)
Answer
(A) 17 3^ 5
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