JEE Main 2013 — Statistics Question with Solution
JEE Main 2013 (25 Apr Online)
Question
In a set of observations, half of them are equal to ' ' and the remaining hall are equal to ' '. If the standard deviation of all the observations is 2 ; then the value of is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A2
Step-by-step explanation
Clearly mean
Now, standard deviation
Hence,
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This is a previous-year question from JEE Main 2013, 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.