The mean and variance of ' n ' observations x_{1}, x_{2}, x_{3}, ......., x_{n} are 5 and 0 respectively. If \\sum_{i=1} ^{n} x_{i}^{2}=400, then the value of n ' is equal to

AP EAPCET 19-Aug-2021 Shift 2 Paper

Section: Mathematics

Question : 34 of 160

Marks: +1, -0

The mean and variance of ' n ' observations x1,x2,x3,.......,xn are 5 and 0 respectively. If

∑

i=1

xi2=400, then the value of n ' is equal to

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