If you are backing out of your driveway and struck by a car in mobile home park who is at fault?

It depends on the specific circumstances of the accident. Generally speaking, the driver of the car is responsible for maintaining a safe distance from other vehicles and pedestrians and for avoiding collisions. However, if you were backing out of your driveway and did not yield the right of way to the oncoming car, you may also be partially or wholly at fault for the accident. It's important to consult with an attorney to determine who is at fault in your specific situation.