There are two generators in a power system. N o-l oad fr equenci es of t he gener at or s ar e 51.5 Hz and 51 Hz, respectively, and both are having droop constant of 1 Hz/MW. Total load in the system is 2.5 M W. Assuming that the generators are operating under their respective droop characteristics, the frequency of the power system in Hz in the steady state is ________.