If the mean of the data 7,8,9,7,8,7, \lambda, 8 is 8 then variance of the data [AP EAPCET 23 May 2024 S1]

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If the mean of the data 7,8,9,7,8,7,λ,8 is 8 then variance of the data

[AP EAPCET 23 May 2024 S1]

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