Properties: p(x) ≥ 0; Σ p(x) = 1 — IITM BS previous year questions

Properties: p(x) ≥ 0; Σ p(x) = 1 is part of Probability Mass Function - PMF (L9.3), Week 9 in Statistics 1. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.