determining odds question

I remember hearing someone describe how to figure out your odds of making a certain morph. for example you take mojave x mojave and you have a 25% chance of making a BEL per egg. but then there is some way to figure out the odds that you will produce one based on how many eggs you have. so it gives you your real odds. does anyone know how to do this

Let's say you have a 25% chance per egg of hatching a BEL. You also have, in each egg, a 75% chance of NOT hatching a BEL.

With two eggs, it's .75 x .75 = .56 Which is a 56% chance you won't hatch a BEL.

With four eggs it's .75 x .75 x .75 x .75 ..... Which is a 32% chance you won't hatch a BEL. (68% chance you WILL hatch a BEL)

Eight eggs would be a 10% chance of missing the BEL...or a 90% chance of hatching at least one.

Hope that answered your question.

yes thank you very much