JEE Mains 03-Sep-2020 Shift 2 Solved Paper

Section: Mathematics

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Question : 65 of 75

Marks: +1, -0

Let xi(1 ≤i ≤10) be ten observations of a random variable X. If

10

∑

i=1

(xi−p)=3 and

10

∑

i=1

(xi−p)2=9 where 0≠p∈R, then the standard deviation of these observations is:

[3 Sep 2020 Shift 2]

√
3
5
7
10
9
10
4
5

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