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MHT CET 2025 Mathematics question

MathematicsProbabilityMHT CET 2025

For k = 1, 2, 3 the box contains k red balls and (k+1) white balls. Let , and . A box is selected at random and a ball is drawn from it. If a red ball is drawn from it, then the probability that it comes from box is

Answer: (B)

Solution

Box has red and white balls, so , , . By total probability, . By Bayes' theorem,

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Question ID VK-101248