There are 10 people in a room. If each person shakes hand with exactly 4 other p

游客2024-01-12 59

问题 There are 10 people in a room. If each person shakes hand with exactly 4 other people, what is the total number of handshakes?

选项 A、20
B、30
C、40
D、50
E、60

答案 A

解析 10个人，每人握手4次，那总数是40次。但每次握手是两个人，相当于每次握手的行为算了2次，所以40/2=20，答案是A。

转载请注明原文地址:https://tihaiku.com/zcyy/3355185.html

相关试题推荐

随机试题

最新回复(0)

Whichofthefollowingbestcompletesthepassagebelow?Peoplebuyprestigewhe