At the end of a banquet 10 people shake hands with each other. How many handshakes will there be in total?

admin2019-01-16 78

问题 At the end of a banquet 10 people shake hands with each other. How many handshakes will there be in total?

选项

答案45

解析试想这十个人排成一排，那么站在最左边的人依次与右边九个握手，而左边数第二个至于其右边八个人握手即可，依次类推，得出算式：9+8+7+…+2+1=45。

转载请注明原文地址:https://kaotiyun.com/show/FH8K777K

B类竞赛（英语专业本科专科）

相关试题推荐

随机试题

最新回复(0)