How many chicken eggs hatch out of 12?

It's impossible to say exactly how many chicken eggs out of 12 will hatch without more information. Here's why:

* Fertility: Not all eggs are fertilized. A hen needs to mate with a rooster for an egg to have the potential to hatch.

* Incubation: Even if fertilized, eggs need proper incubation (temperature, humidity) for the chick to develop.

* Other Factors: Diseases, damage to the eggs, and other factors can prevent hatching.

Typically, you can expect a good hatch rate of 80-90% if the eggs are fertile and incubated correctly. So, out of 12 eggs, you might get 9-11 chicks. However, this is just an estimate.