The weightage of each paper in the UPSC selection process is structured as follows: the Preliminary Examination consists of two papers, each carrying 200 marks, but only qualifying in nature. The Mains Examination includes nine papers with a total of 1750 marks, where seven papers are counted for ranking purposes. Lastly, the Personality Test has a weightage of 275 marks. The overall selection process, therefore, integrates these components to derive a final score vital for candidate ranking and selection for the Indian Administrative Service and other civil services.