Concept:Track net displacement in north-south and east-west directions.Explanation:Start at house.North: +15 km.West: −10 km (east-west).South: −5 km (north-south).East: +10 km (east-west).Net north-south: 15−5=10 km north.Net east-west: −10+10=0 km.Final position is 10 km north of house.Thus, direction from house is North.Answer:North