JEE Main 2003 — Probability Question with Solution
From: AIEEE 2003
Question
The mean and variance of a random variable having binomial distribution are and respectively, then is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Mean = = 4
Variance = = 2
= 2
=
p = 1 - q = 1 - =
n = 8
Now P(X = 1) =
=
=
Variance = = 2
= 2
=
p = 1 - q = 1 - =
n = 8
Now P(X = 1) =
=
=
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This is a previous-year question from JEE Main 2003, 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.