JEE Main 2023 — Statistics Question with Solution
From: JEE Main 2023 (Online) 8th April Evening Shift
Question
Let the mean and variance of 12 observations be and 4 respectively. Later on, it was observed that two observations were considered as 9 and 10 instead of 7 and 14 respectively. If the correct variance is , where and are coprime, then is equal to :
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Show full solutionCorrect option: A
Step-by-step explanation
Also, variance
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This is a previous-year question from JEE Main 2023, 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.