PTT職涯區 / GRE (GRE入學考試)

[計量] 兩題計量想要請問一下^^

看板GRE (GRE入學考試)作者 (USC)時間16年前 (2009/12/04 09:53), 編輯推噓2(2推 0噓 3→)
留言5則, 1人參與, 最新討論串1/2 (看更多)
1.three friends are playing a game in which each person simutaneously displays one ofthree hand signs:a clenched fist,an open plam, two extended fingers. how many different combinations of the signs are possible? 2. during a certain chess tournament, if each of six players play every other player exactly twice, how many matches will be played during the tournament? 拜託大家幫幫我^^ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.138.31.201
推
12/04 10:12, , 1F
1.一人三種3*3*3=27
12/04 10:12, 1F
推
12/04 10:19, , 2F
2.六人分別對到兩次:第一人先對其他五人兩次2*5
12/04 10:19, 2F
→
12/04 10:20, , 3F
第二人已經對過第一人兩次只要再對後四人即可2*4
12/04 10:20, 3F
→
12/04 10:22, , 4F
以此類推2*(5+4+3+2+1)=30
12/04 10:22, 4F
→
12/04 10:22, , 5F
不知道對不對 顆顆 XD
12/04 10:22, 5F
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