1. A malfunction judging apparatus for a fuel feeding apparatus that judges malfunction of a first fuel feeding apparatus and a second fuel feeding apparatus which feed fuel into an air intake path and a cylinder of an internal-combustion engine, respectively, comprising: an air-fuel ratio parameter detecting unit that detects an air-fuel ratio parameter which represents an air-fuel ratio of an exhaust gas flowing through an exhaust path of the internal-combustion engine; a load parameter detecting unit that detects a load parameter which represents a load of the internal-combustion engine; a feedback correction value calculating unit that calculates a feedback correction value by using the detected air-fuel ratio parameter and a predetermined feedback control algorithm; a fuel control unit that controls the amount of fuel fed through the first fuel feeding apparatus and the second fuel feeding apparatus by using the calculated feedback correction value; a region judging unit that determines which of a first region, in which only the first fuel feeding apparatus should be used, a second region, in which only the second fuel feeding apparatus should be used, and a region other than the first region and the second region, the detected load parameter is in; and a malfunction judging unit that, on the basis of a result of the determination of the region judging unit, (i) learns, as a first learned value, a feedback correction value calculated in a case where the load parameter is in the first region by using a predetermined first learning method, (ii) learns, as a second learned value, a feedback correction value calculated in a case where the load parameter is in the second region by using a predetermined second learning method, (iii) judges malfunction of the first fuel feeding apparatus on the basis of the first learned value, and (iv) judges malfunction of the second fuel feeding apparatus on the basis of the second learned value, the malfunction judging unit judging malfunction of the first fuel feeding apparatus and malfunction of the second fuel feeding apparatus by using different methods.