JEE Main 2019 — Statistics Question with Solution
From: JEE Main 2019 (Online) 12th April Morning Slot
Question
If the data x1, x2,......., x10 is such that the mean of first four of these is 11, the mean of the remaining six is
16 and the sum of squares of all of these is 2,000 ; then the standard deviation of this data is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B2
Step-by-step explanation
Now x1 + x2 + x3 + x4 = 44 & x5 + x6 + ......... + x10 = 96
Hence = = 200 - 196 = 4
Hence = 2
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This is a previous-year question from JEE Main 2019, 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.