Number of Onto and One-One Functions | JEE 2027 Maths (English)

Free notes + solved JEE problems for this lesson: https://rankdeterminant.com/go/yt-mat... This chapter:    • Inclusion–Exclusion, Functions and Subsets...   All lessons of this unit:    • JEE 2027 Maths | Unit 4 Permutations and C...   How to count functions from a set of m elements to a set of n elements: all functions n^m, one-one functions nPm, bijections n!, onto functions by inclusion–exclusion, into and many-one functions, strictly increasing and non-decreasing functions, fixing given values first, and two solved problems with the classic traps. Chapters 0:00 Introduction 0:32 All functions, one-one functions, bijections 1:59 Onto, into and many-one functions 3:31 Increasing functions, and fixed values 4:32 Example 1: all, one-one, onto functions and bijections 6:05 Example 2: non-decreasing functions from a 5-set to a 3-set 6:49 Example 2, part two 7:54 Quick revision: all, one-one, onto and increasing functions A free JEE paper every day and a full JEE Main mock every Sunday: https://rankdeterminant.com/go/yt-dai... Mathematics · Unit 4 · Permutations & Combinations · Chapter 5 · Inclusion–Exclusion, Functions and Subsets #OntoFunctions #JEEMaths #JEE2027 Narrated with a computer voice.