Based on the table below, which shows the marks (out of 100) of five students over the years 2021 to 2025, which year witnessed the lowest average marks attained by the students? YearABCDE2021758275847420229093858679202396766585852024928566818220258682738083

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?