【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】

*An explanation of this problem using a Venn diagram is available here.    • 【数的処理】集合を「ベン図」で解くなら「正の字」がカギ【東京都】   *A set problem has been added.    • 【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 "set" problem frequently asked in Tokyo. The key to set problems is to understand the situation using Venn diagrams or Carroll tables. This time, we'll focus on solving the problem using a "Carroll table." When using a Carroll table, the key is to pay attention to the "faces" when reading the table and writing numbers. Once you become proficient with Carroll tables, you'll automatically see the next desired result. Compare it with a Venn diagram and try your preferred method. R3 Tokyo Type 1B Difficulty Level A (Basic Problem)