[問題]GWD28-37

[magic]

Q37:
In a meeting of 3 representatives from each of 6 different companies, each person shook hands with every person not from his or her own company. If the representatives did not shake hands with people from their own company, how many handshakes took place?

A. 45
B. 135
C. 144
D. 270
E. 288

請問大大們這題是什麼意思壓??

[spreewell]

這題應該是說有6間公司參與會議，每間公司有3位代表，然後相互握手，問說全部總共握了幾次手(條件限制：自己公司內的不握)
依條件我們可得以下算式：
(3X15X6)/2=135
(因為條件限制說自己公司的不握，表示一個人還有15個人要去握，ㄧ間公司有3個人，總共有6間公司，再扣除重複的情形，便可得以上算式)
所以答案為B..i guess

[magic]

謝謝大大
說的很清楚
了解了^^