Hens or Roosters?

I understood when I bought my chicks that they were too young to be sexed. This means of course that there is a 50% chance that any of them could be male or female. The woman I bought them from was pretty certain that I was receiving four females… I posted photos of the chicks on BackyardChickens.com and the results are not good! Several of the members are pretty sure I have a couple roosters. I am not entirely opposed to the idea of keeping roosters, but I’m sure the neighbors would file complaints over the crowing. And besides, I want edible eggs, not more chicks!