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lang-mma
Function(introduced to deal with nested#&'s) suggesting a refactoring in the code of this answer and in particular a dropping of one of the Table's iterators. The snippetTable[youngest[Select[#age == x &] /* CountsBy[#survived &] /* ({#[True], #[False]} &)]//Normal,{x,Range@cutoff}]is equivalent, perhaps of comparable readability but certainly improved efficiency-wise. $\endgroup$