Probability of picking balls from bags [Hinglish] | Probability | Grade 12 | Math | Khan Academy

In this video, we solve several classic probability problems involving drawing balls from different bags, which are perfect applications of Bayes' theorem and the law of total probability. We'll tackle scenarios where a bag is chosen at random before a ball is drawn, and then use the outcome of the draw to determine the probability it came from a specific bag. We'll also look at a problem where the composition of the urn changes based on the first draw.

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Timestamps:
00:00 Problem 1: Ball drawn from one of two bags is red. Find P(it was from Bag II).
03:00 Problem 2: Ball drawn, noted, returned with 2 more of the same color. Find P(second ball is red).
05:00 Problem 3: Ball drawn from one of two bags is red. Find P(it was from the first bag)

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Created by
Ashish Gupta