User:M1ss1ontomars2k4/sandbox4

$$ \begin{align} \mbox{mean} & = \bar x \\ & = {\sum_{i=1}^N x_i \over N} \\ & = \frac{0.097 + 0.09766 + 0.1000}{3}\\ \bar x & = 0.0987 \end{align} $$