Explanation:

Do: - Rahul and Salma are friends and decide to start their own business. For this they planned to open a shop in Delhi

that would sell traditional Kashmiri woollen handi-craft. To ensure that Delhi is the best place for their business, they

decide to survey the people of Delhi to find out how popilar are Kashmiri handi-crafts. Salma knows that they would get

the most accurate results if each household in Delhi is surveyed. But Rahul points it out problematic. Described why

Rahul think so.