Harmonic mean of $$$8$$$, $$$16$$$

Find the harmonic mean of $$$8$$$, $$$16$$$.

The harmonic mean of data is given by the formula $$$H = \frac{n}{\sum_{i=1}^{n} \frac{1}{x_{i}}}$$$, where $$$n$$$ is the number of values and $$$x_i, i=\overline{1..n}$$$ are the values themselves.

Since we have $$$2$$$ points, $$$n = 2$$$.

The sum of the reciprocals of the values is $$$\frac{1}{8} + \frac{1}{16} = \frac{3}{16}$$$.

Therefore, the harmonic mean is $$$H = \frac{2}{\frac{3}{16}} = \frac{32}{3}$$$.

The harmonic mean is $$$\frac{32}{3}\approx 10.666666666666667$$$A.