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Mathematics · 2013
JEE Main 2013 · 2013-04-07 Offline · Q22
A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. The probability that a…
A multiple choice examination has $\displaystyle 5$ questions. Each question has three alternative answers of which exactly one is correct. The probability that a student will get $\displaystyle 4$ or more correct answers just by guessing is :
Official answer
(4)
$\displaystyle \frac{11}{3^5}$
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JEE Main 2013 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.