1/(2x2x2x2) for the odds of all roosters, 1/(2x2x2) for 3 roosters or hens, etc. It's been quite a while since I took a course that covered statistics/probability material, but I think it's right. 1/16 of a chance for all roosters or hens.
1/16 - 6.25 - 1 rooster
2/16 - 12.5% - 2 roosters
3/16 - 18.75% - 3 roosters
4/16 - 25% - 4 roosters
Elkslayer, something is wrong here.
You have it twice as likely to get four of the same sex as to get an even split.
And you have the odds of getting three females at 15/16 while odds of getting three males is 3/16.
