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Curated by: Khan Academy India - English (21 videos)
We bring in all the concepts covered in the previous videos to tackle a complex rearrangement problem. We rearrange the letters of the word INDEPENDENCE. We first find all possible arrangements. We then find words which start with P. Adding another constraint, we then find words that start with P and end with I. Finally, we also look at words which are always and never together. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/math/ncert-class-11/xea4762213f311c5e:permutations-and-combinations-ncert-new/xea4762213f311c5e:untitled-900/e/permutations_1) Timestamps: 00:00 Listing down the questions discussed in the video 01:08 Problem 1: Rearrange INDEPENDENCE 02:22 Problem 2: Cases when words start with P 03:15 Problem 3: Cases when words start with P and end with I 04:08 Problem 4: Cases when all vowels are always together 06:07 Problem 5: Cases when all vowels are never together Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Ashish Gupta