精華區beta puzzle 關於我們 聯絡資訊
題目網址: http://www.puzzleup.com/2014/ http://www.puzzleup.com/2014/puzzle/?256 答題時限: 11月6日7PM-比賽結束(約12月17日) 加分時限: 11月6日7PM-11月12日6:59PM 答對可得基本分100分。答案可上傳5次,每改1次答案從基本分扣20分。  比賽期間內可隨時上傳答案,加分時限內答對第n天加(6-n)分        另依題目的難易有額外加分(如有80%的人這題答錯,答對者加80分)   ◆Chess Players There are 24 players in a chess tournament. 8 teams participated with 2 players , and 8 teams participated with 1 player. For the 12 matches in the first round, the pairings will be drawn randomly. What is the probability that at least 4 matches will be played between players from the same team? Enter your answer as a simplified fraction. Example:12/23 在一場西洋棋比賽中有 24 位參賽者。 有八個隊伍有兩人參賽,另外八個隊伍有一人參賽。 第一回合的十二場比賽的對陣是隨機決定的。 試問這當中存在至少四場比賽為來自同隊伍的人對戰的機率為何? 答案以最簡分數輸入,如 12/23。 -- LPH [acronym] = Let Program Heal us -- New Uncyclopedian Dictionary, Minmei Publishing Co. -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 123.195.39.85 ※ 文章網址: http://www.ptt.cc/bbs/puzzle/M.1415194410.A.744.html ※ 編輯: LPH66 (123.195.39.85), 11/07/2014 06:59:35