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题目内容
In a local election there are 2 candidates for mayor, 4 candidates for sheriff, and 5 candidates for dogcatcher on the ballot. In each of the three categories a voter may vote for exactly one candidate or none. How many different ways can a vote fill out the ballot?
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· 相关考点
6.3.1 计数原理
6.3.1 计数原理
以上解析由 考满分老师提供。