 Hello and welcome to the session. In this session we are going to discuss the following question and the question says that Catherine wants to write a book that reflects the diversity of the country. To know the citizens properly regarding their culture and traditions, she surveys the citizens of various groups based on the percentage of population, if it is a random and representative sample. We know that random sample is a sample chosen without any preference and in a representative sample the people or items chosen accurately reflect the group as a whole with this key idea we proceed to the solution. In this question we are given that Catherine wants to write a book that reflects the diversity of the country and for this she surveys the citizens of various groups based on the percentage of population. So here population is all the citizens of the country and sample is the citizens of various groups that she surveys based on the percentage of population. Now clearly it is a random sample because she is choosing any person from each group and from the key idea we know that random sample is a sample chosen without any preference. So we can see this is a random sample and we also know that in a representative sample the people or items chosen accurately reflect the group as a whole. Since there is diversity in the country, so there are people belonging to different cultures and traditions. She divided the people in groups and then chose people from each group according to their percentage of population in the country. It means all the groups have their representatives in the sample for survey which is based on the percentage of population. So we can say it is the true representative of the population. This completes our question. Hope you enjoyed this question.