In a placement test conducted by a software company across five colleges, the total number of candidates who qualified from each college is given below: College A: 120 College B: 135 College C: 300 College D: 210 College E: 235 The number of candidates who qualified for the placement test from College B is approximately what percentage of the total number of candidates who qualified from all the colleges combined?

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?