JEE Main 2024 — Statistics Question with Solution
JEE Main 2024 (04 Apr Shift 1)
Question
Let . Let the mean and the variance of 6 observations be 2 and 23 , respectively. The mean deviation about the mean of these 6 observations is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
$\begin{aligned}
& \frac{\sum x_i}{6}=2 \text { and } \frac{\sum x_i^2}{N}-\mu^2=23 \\
& \alpha+\beta=10 \\
& \alpha^2+\beta^2=52
\end{aligned}$
solving we get
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Statistics 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 2024, covering the Statistics 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.