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Curated by: Khan Academy India - English (21 videos)
In this video, we look at the formula for permutations and combinations of r distinct objects out of n distinct objects. We look at a convenient way to find number of combinations. We then practice using the formulae and observe a few key results. 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-908/e/permutations_and_combinations_2) Timestamps: 0:00 Formula for permutations 1:55 Formula for combinations 3:05 A convenient way to find combinations 4:50 Practicing using the formula for combinations 6:50 Key observations and special results 8:00 Practicing using the formula for permutations 9:05 Key observations and special results 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