JEE Main 2015MathematicsProbabilityMediumMCQ

JEE Main 2015 — Probability Question with Solution

JEE Main 2015 (11 Apr Online)

Question

If the mean and the variance of a binomial variate X  are 2 & 1 respectively, then the probability that X takes a value greater than or equal to one is:

Choose an option

Show full solutionCorrect option: D
Correct answer
D1516

Step-by-step explanation

np=2

npq=1

∴q=12

p=1-q=12

n=4

PX≥1=1- 4C0 124120

1-116=1516

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Probability chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2015, 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.