CBSE Class 10 Answered
We assume you are refering to harmonic mean, by H M.
Harmonic mean of a given data, x1, x2, ...xn be XHM, is given by,
XHM = n/Σ(1/xi) where the summation is over i = 1,2...n.
For example, the equivalent resistance of n parallel resistors is a HM/n, and the equivalent capacitance of n series capacitors is also HM/n.