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ID: past-exam-of-the-mathematics-course-of-the-university-of-oxford/2023/prelims/mathematics-iii/4/b/i/solution

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Past exam of the mathematics course of the University of Oxford / 2023 / Prelims / Mathematics III / 4 / b / i / Solution by Codex 0 2026-10-25
The first swap necessarily removes one red ball from urn 1 and replaces it with a blue ball. Thus with probability one.
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