If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations?

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Mean of m observations is n Mean of n-m observations is m So total = nm+ (n-m)m Total observations = n Mean = Total / Total observations = (2mn-m^2)/n = 2m –m^2/n

If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations?

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