Mixed problems requiring both P and C — IITM BS previous year questions

Mixed problems requiring both P and C is part of Permutations vs Combinations - When Order Matters (L6.2), Week 6 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.