Combination formula C(n, r) = n! / (r! (n-r)!) — IITM BS previous year questions

Combination formula C(n, r) = n! / (r! (n-r)!) is part of Combinations - Unordered Selections (L6.1), 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.