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题目内容双击单词支持查询和收藏哦～
Each person at a party shook hands exactly once with each of the other people at the party. There was a total of 21 handshakes exchanged at the party.
Quantity A
The number of people at the party
Quantity B
8
B显示答案
· 相关考点
6.3.5 组合 2.5.9 握手问题
6.3.5 组合
2.5.9 握手问题
以上解析由 考满分老师提供。
