JEE Main 2021 — Probability Question with Solution
From: JEE Main 2021 (Online) 24th February Morning Shift
Question
An ordinary dice is rolled for a certain number of times. If the probability of getting an odd
number 2 times is equal to the probability of getting an even number 3 times, then the
probability of getting an odd number for odd number of times is :
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
P(odd no. twice) = P(even no. thrice)
Success is getting an odd number then P(odd successes) = P(1) + P(3) + P(5)
Success is getting an odd number then P(odd successes) = P(1) + P(3) + P(5)
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This is a previous-year question from JEE Main 2021, covering the Probability chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.