Selection followed by Arrangement | JEE Main 2027 Maths (English)

Free notes + solved JEE problems for this lesson: https://rankdeterminant.com/go/yt-mat... This chapter:    • Combinations | JEE Maths Unit 4, Chapter 3...   All lessons of this unit:    • Permutations & Combinations | JEE Main 202...   How to count words and numbers in two stages: first select the objects with nCr, multiplying over the groups, then arrange the chosen objects, r factorial ways for r different objects in a row, or just one way when the order is fixed. Two JEE-style solved problems, words from consonants and vowels and numbers with strictly increasing digits, with the classic traps. Chapters 0:00 Introduction 0:41 Two stages: select, then arrange 1:51 Conditions: select group by group 2:43 Stage two depends on the rule 3:20 Example 1: words with 3 consonants and 2 vowels 4:20 Example 2: 4-digit numbers, increasing or decreasing digits 5:45 Quick revision: select first, then arrange 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 3 · Combinations #PermutationsAndCombinations #JEEMaths #JEE2027 Narrated with a computer voice.