JEE Main 2017 — Statistics Question with Solution
From: JEE Main 2017 (Online) 9th April Morning Slot
Question
The sum of 100 observations and the sum of their squares are 400 and 2475,
respectively. Later on, three observations, 3, 4 and 5, were found to be incorrect. If
the incorrect observations are omitted, then the variance of the remaining observations
is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D9.00
Step-by-step explanation
We have
The variance of the remaining observations is
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This is a previous-year question from JEE Main 2017, 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.