I have 7 males and 3 females in one town. I dress all but one of the guys in the blue suit with the red tie. I would like to get rid of one snarky female and if I do, I hope another Stepford husband moves in. I already have his suit! You can control whether your mayors are male or female. My mayor in that town is always female.

I would assume the chances for each individual townsperson are 50:50. The calculation of overall probabilities is left as an exercise for the reader...