JEE Main 2021 — Probability Question with Solution
From: JEE Main 2021 (Online) 26th February Morning Shift
Question
A fair coin is tossed a fixed number of times. If the probability of getting 7 heads is equal to probability of getting 9 heads, then the probability of getting 2 heads is :
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Let the coin be tossed n-times
P(7 heads) =
P(9 heads) =
P(7 heads) = P(9 heads)
P(2 heads) =
P(2 heads)
P(7 heads) =
P(9 heads) =
P(7 heads) = P(9 heads)
P(2 heads) =
P(2 heads)
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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.