Ordered selection of r objects from n distinct objects — IITM BS previous year questions

Ordered selection of r objects from n distinct objects is part of Permutations - Distinct Objects (L5.3), Week 5 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.