What are the chances of these eggs being fertile?

[Tokajein]

My friend who owns a farm owns a bunch of ducks.
But has no idea what gender any of them are.
they are all about a year old now.
most of them are crested ducks.
Then I think they have one female mallard duck.
They also have a couple of black ducks (no idea what breed they are)
But anyways since some of them are laying eggs, I was just wonder what the chances were of them being fertile.
Since I was thinking about maybe trying to hatch some of them.

 

[aduckstolemyheart]

It's very likely she has some of each sex. Which means it is also very likely that the eggs are fertile.

Word to the wise though, if the ducks came from two crested parents (which sounds like at least a possibility) at least a portion of the ducklings ( I wanna say 25% ??) wont hatch or survive. Inheriting the gene from both parents produces a fatal combination. It's tricky, but the portion of ducklings that get BOTH crested genes passed on to them won't make it. Those that get none, or one should be fine. Make sense?