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JEE Main 2026 Mathematics question

MathematicsProbabilityJEE Main 2026

A bag contains 10 balls out of which k are red and are black, where . If three balls are drawn at random without replacement and all of them are found to be black, then the probability that the bag contains 1 red and 9 black balls is :

Answer: (4)

Solution

Using Bayes' theorem with ,

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Question ID VK-001526