【R5警視庁Ⅰ類③】集合の定番問題。ベン図で解くか、キャロル表で解くか【数的処理】

This is a classic problem involving sets. Problems involving three sets can be solved using either Venn diagrams or Carroll tables, so use whichever is easier for you. 1:18 "Sets" Solution Strategy 2:19 Explanation using Venn diagrams 9:12 Explanation using Carroll tables *Venn diagrams    • 【数的処理】集合を「ベン図」で解くなら「正の字」がカギ【東京都】   *Carroll tables    • 【数的処理】集合を「キャロル表」で解くなら「面」で捉えるのがカギ【東京都】   R5 Metropolitan Police Department, Category I, 3rd Exam Difficulty Level A (Basic Problems)