विचाराधीन पांच गांवों की कुल जनसंख्या 30,000 है, जो इस प्रकार वितरित है: A = 10%, B = 25%, C = 20%, D = 30%, और E = 15%। गांव D और E की औसत जनसंख्या ज्ञात कीजिए।

In a data table, the production of rice for country Q and country R is 60 lakh tons and 54 lakh tons respectively. The production of wheat for country S and country T is 52 lakh tons and 52 lakh tons respectively. What is the ratio of the total production of rice of countries Q and R to the total production of wheat of countries S and T?

In a survey of 5 countries (P, Q, R, S, T), the rice production values are 40, 60, 54, 70, and 51 lakh tons respectively. What is the average production of rice (in lakh tons) across all 5 countries?