The variance of five positive observations is 3 \cdot 6. If four of the observations are 2,2,4,5 then what is the remaining observation ? [NDA-I 2022]

NDA Math Statistics Part 2

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The variance of five positive observations is 3⋅6. If four of the observations are 2,2,4,5 then what is the remaining observation ?

[NDA-I 2022]

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