作者charliejack (charliejack)
看板Grad-ProbAsk
標題[理工] [離散] 排列組合
時間Thu Feb 10 19:49:50 2011
In a lottery game, there are 100 tickets.
The tickets are numbered 1, 2, ..., 100.
Four different prizes are awarded. if the people holding
tickets 2, 4, 8, and 16 all win prizes,
how many ways are there to award the prizes?
(A)1024
(B)990
(C)32
(D)24
我其實有點看不懂題目......
我的認知是 拿到 2, 4, 8, 16 的組合方法嗎?
4 + 6 + 4 + 1 = 15?
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推 boy5548:應該是4個號碼裡有2,4,8,16至少一個吧 02/10 20:01
→ jameschou:樓上 這樣答案好像會很大@@ 02/10 20:28
→ jameschou:而且題目似乎沒有說一個人有幾張? 02/10 20:28
→ BenLinus:D,得獎號碼是2,4,8,16; 把特獎 二獎 三獎 四獎分給他們 02/10 20:31
→ BenLinus:決定一下哪個號碼是幾獎就好, 答案就4! 02/10 20:31
推 jameschou:有道理XD 02/10 20:33
→ charliejack:感謝XD~~ 02/11 08:48