Rural King Pullet Questions

[Darkwish]

Hi!
So, my teacher bought a bunch of pullet chicks from Rural King. I took home 4 of them once he was finished with them. These are my first chickens ever. But I'm learning fast.
Anyways, does anyone know what the breeds of pullet chicks usually are? Most of the chicks my teacher had were brown or black. But there was a couple cream ones and a large yellow one. I took 3 browns and a black.
Also, I presume they're all hens. But is it possible for a cockerel to get mixed in here or there?
Thanks!

 

[RoostersCrow HensDeliver!]

There are lots of breeds with brown and black chicks.

Post some pictures so we can try to guess what breeds they are.

 

[Darkwish]

Here ya go! Sorry they're not very good photos.
They're about a month old.

 

[Darkwish]

Anyone, anyone? ;D

 

[RoostersCrow HensDeliver!]

Rhode Island Red or production red maybe New Hampshire
Black Australorps

 

[Darkwish]

Thank youuu!