Tutoring with Aanchal

Answer

Complementary Goods - As the name suggests, complementary is something that compliments or support the other. Therefore complementary goods are those goods where the demand for other good will be directly proportionate to the demand of complementary good. For example - Car and petrol are complementary goods. You will need petrol for running a car. Therefore if the demand for cars increase, the demand for petrol will also increase proportionately. 

Another example of complementary goods are - Bread and butter, Printer and Cartridge etc, where the goods compliment the demand for each other. 

Please let me know if you have any questions. Thanks.