what type of corn snake will i get if i breed a ghost motley

  here is the female ...

http://iansvivarium.com/morphguide/ghost/pics/ghost-m.jpg

and the male ...

http://iansvivarium.com/morphguide/hypomelanistic/pics/hypomelanistic-v.jpg
Since ghost is a cross of hypo and anery, that means both your corns have hypo in their genes. Hypomelanism in a dominant trait, so you will have hypo babies that are het motley and anery. Of course, without knowing your snakes' complete genetic backgrounds, it's impossible to say with 100% certainty. Hope this helps.:)