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A={7, 8, 9, 10, 11}
B={25, 26, 27, 28}
If a number $$x$$ is selected from set A and a number y is selected from set B, then $$x+y$$ can have how many different possible values?
B={25, 26, 27, 28}
If a number $$x$$ is selected from set A and a number y is selected from set B, then $$x+y$$ can have how many different possible values?
A显示答案
· 相关考点
6.3.1 基本计数原理与加法原理
6.3.1 基本计数原理与加法原理
以上解析由 考满分老师提供。
