what would i get if i cross a white rock rooster with delaware hens

[blueseal]

what 50/50 or more whte rock

 

[Krys109uk]

It depends upon the genotype of the white rock. If they are recessive white they could be anything underneath & the result could not be properly predicted. Other than to say male offspring would be barred & the female offspring non barred. If gold underneath, it is possible you could get some sort of gold silver sex link.
If white rocks are silver with dominant white you would probably get mostly white offspring.