Discrete random variable - countable set of possible values — IITM BS previous year questions

Discrete random variable - countable set of possible values is part of Types of Random Variables (L9.2), 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.