दिए गए आंकड़ों के आधार पर, यदि अस्पताल A ने 100 परीक्षण, अस्पताल B ने 50 परीक्षण, अस्पताल C ने 100 परीक्षण और अस्पताल D ने 50 परीक्षण किए, तो शहर 4 (City 4) में सकारात्मक (पॉजिटिव) मामलों का अनुमानित प्रतिशत कितना है? (सकारात्मक मामले: Hosp A = 10, Hosp B = 5, Hosp C = 5, Hosp D = 15)

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?