JEE Main 2026 Model Paper 1

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Question : 69 of 75

Marks: +1, -0

If

18

∑

i=1

(xi−8)=9 and

18

∑

i=1

(xi−8)2=45 then the standard deviation of x1,x2,.....x18 is :-

4.78
1.50
9.87
5.82

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