A bar graph shows the average marks scored in a Mathematics examination (out of 100) by students of 6 divisions of the XIIth standard. If the average marks scored by Division B is 45 and by Division D is 65, what is the ratio of the average marks scored by Division B to Division D?

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?