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题目内容双击单词支持查询和收藏哦～
Passwords for a certain computer consist of 5 symbols typed on a computer keyboard. Each password consists of one @ symbol, two # symbols, and two $ symbols, typed in any order. For example, @#$$# and $#$#@ are two different passwords for the computer.
Quantity A
The total number of different passwords for the computer
Quantity B
30
C显示答案
· 相关考点
6.3.7 密西西比法
6.3.7 密西西比法
以上解析由 考满分老师提供。
