Harmonic mean of $$$2$$$, $$$28$$$

Find the harmonic mean of $$$2$$$, $$$28$$$.

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 $$$\frac{1}{2} + \frac{1}{28} = \frac{15}{28}$$$.

Therefore, the harmonic mean is $$$H = \frac{2}{\frac{15}{28}} = \frac{56}{15}$$$.

The harmonic mean is $$$\frac{56}{15}\approx 3.733333333333333$$$A.