ÖMO 2023 Problem 3

Given a positive integer $n$ , find the proportion of the subsets of $\{1,2, \ldots, 2n\}$ such that their smallest element is odd.

Dataset text AI-MO AoPS. Quoted with source.

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.