Factorial Final Surge | JEE 2026 | JEE Mains 2026 + JEE ADV. 2026
Curated by: Factorial Academy (60 videos)
Derangement Complete Theory + Proof + Problems | PnC Final Surge | JEE Mains & Advanced In this session, we cover Derangement (Permutation with no fixed points) from absolute basics to full JEE level mastery. This is not a shortcut video. This is complete theory + proof + applications + exam problems. Inside the lecture: • Meaning and intuition of derangement • Step-by-step derivation of the formula • Proper mathematical proof of Dₙ • Connection with permutations & inclusion–exclusion • Standard problem types • JEE Mains & Advanced level questions • How to think, not memorize This video is part of the Factorial Final Surge Series, where we systematically cover every concept of every chapter required for JEE — theory + logic + problems — so that nothing is left for last-minute panic. If you follow this series seriously, PnC becomes scoring, not scary. Join the Factorial Academy community for notes, updates & discussions: 👉 https://t.me/academyfactorial #FactorialAcademy #PermutationCombination #Derangement #PnC #JEEMains #JEEAdvanced #JEE2026 #JEEMains2026 #JEEMaths2026