JEE Main 2020MathematicsStatisticsMediumMCQ

JEE Main 2020 — Statistics Question with Solution

JEE Main 2020 (03 Sep Shift 2)

Question

Let xi1≤i≤10 be ten observation of a random variable X. If ∑i=110xi-p=3 and ∑i=110xi-p2=9 where 0≠p∈R, then the standard deviation of these observations is:
 

Choose an option

Show full solutionCorrect option: C
Correct answer
C910

Step-by-step explanation

Standard Deviation S.D.=∑i=110xi-p210-∑i=110xi-p102

=910-3102=910

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About this question

This is a previous-year question from JEE Main 2020, 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.