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?
1
\(2m - \frac{{{m^2}}}{n}\)
2
\(2m + \frac{{{m^2}}}{n}\)
3
\(m - \frac{{{m^2}}}{n}\)
4
\(m + \frac{{{m^2}}}{n}\)