If the total number of observations is 20,\sumx_i=1000 and \sumx_i^2=84000,then what is the variance of the distrubtion ? [NDA I 2016]

UPSC NDA I 2016 Mathematics Solved Paper

Question : 95 of 120

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If the total number of observations is 20,∑xi=1000 and ∑xi2=84000,then what is the variance of the distrubtion ?

[NDA I 2016]

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