On website C, the difference between the total number of viewed videos and the number of downloaded international videos is 187. The number of downloaded regional videos from website C is 19. If the number of videos stored in a hard disk is 75% of the total number of videos downloaded from website C, and the total downloaded videos are 40% of the total viewed videos, find the number of videos from website C stored in the hard disk.

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?