Computing conditional probabilities using joint and marginal PMFs — IITM BS previous year questions

Computing conditional probabilities using joint and marginal PMFs is part of Conditional Distributions, Week 1 in Statistics 2. 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.