The following table shows the marks of four students in four different subjects in an examination. Who among the four students scored the lowest aggregate marks, when marks obtained in all the four subjects are taken together? NameEnglishHindiMathsScienceP65757258Q73677852R71595565S57735871

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?