Explain this question in a easy way ---Q1 Question Stem: If two sets A and B have 99 elements in common, then the number of elements common to each of the sets A x B and B x A are Options: (A) 2^99 (B) 99^2 (C) 100 (D) 18

视频信息

答案文本 复制

视频字幕 复制

Let's understand this step by step. We have two sets A and B with 99 elements in common. The Cartesian product A times B contains all ordered pairs where the first element comes from A and the second from B. Similarly, B times A contains ordered pairs where the first element comes from B and the second from A.