JEE Main 2026 — Statistics Question with Solution
JEE Main 2026 (23 January Shift 1)
Question
Let the mean and variance of 8 numbers be and , respectively. Then the mean of 4 numbers is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A11
Step-by-step explanation
Mean : .
Variance : .
Known squares: , so .
.
.
Mean of .
Variance : .
Known squares: , so .
.
.
Mean of .
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This is a previous-year question from JEE Main 2026, 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.