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Curated by: Khan Academy India - English (21 videos)
This video tackles the application of AND and OR beyond digits and letters. We talk about balls, coins, flags, and people. We first find the total number of arrangements of 3 types of balls. We then nominate President and Vice-president from a group of people. We find the total number of outcomes we can get if we toss a coin a specific number of times. Finally, we deal with scenarios where we create signals using 2 or more flags. 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 Problem 1 (Arrange balls of 3 different colors) 01:12 Problem 2 (Nominate president and vice precident) 02:11 Problem 3 (Find total scenarios for 3 tosses of a coin) 03:19 Problem 4 (Find total number of signals) 04:26 Problem 5 (Another variant for the signal problem) 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