Black and White marble DT x red cambodian CT
What do you mean by black and white? Black as in black head or actual black color patches. And white- as in paper white or celophane white.
Assuming that he is a white opaque;
color probabilities - red cambodian, irid colored cambodian, cambodian with irid on body and fin, pastel like colors, irid colored multi, plus other colors (not sure what the black might throw)
Fin probabilities - read "form breeding" sticky by KadenJames.
You should end up with DTCT geno - physically you wont have equal web reduction, only slight protruding ray (combtail), regular single tails, long dorsal, uneven caudal lobes (comb and regular form),