what is the chance offspring having the hidden abilities if.....
mother has hidden ability?
breeding different types?
I'm not sure I quite understand your question, but to breed a hidden ability you must have a female Pokemon with a hidden ability breed with another Pokemon from that egg group (not Ditto) and you will have a 60% chance of getting offspring with a hidden ability.
Yes but it's a small chance to pass down HA I think like 10-30% to get the HA if it's the female (if you don't breed with Ditto.