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Curated by: Khan Academy India - English (28 videos)
This video focuses on calculating probabilities when making selections from a larger group, using the example of drawing 5 marbles from a box containing 10 red, 20 blue, and 30 green marbles. We'll calculate the total number of ways to draw 5 marbles. Then, we'll find the probability of specific outcomes, such as all marbles drawn being blue, at least one marble being green, and at most 2 marbles being blue. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/math/ncert-class-11/xea4762213f311c5e:probability-ncert-new/xea4762213f311c5e:axiomatic-approach-to-probability/e/probability-of-an-event) Timestamps: 00:00 Introduction: Probability in selections (drawing marbles) 00:48 Calculating total possible combinations of drawing 5 marbles 01:10 Problem 1: Probability that all 5 marbles drawn will be blue 01:40 Problem 2: Probability that at least one marble drawn will be green 02:10 Problem 3: Probability that at most 2 marbles drawn are blue 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