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Quantity A
The number of 3-digit integers all of whose digits are even (the same number could be used for more than once)
Quantity B
The number of 3-digit integers all of whose digits are odd (the same number could be used for more than once)
B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。
