題目網址: http://www.puzzleup.com/2017/ http://www.puzzleup.com/2017/puzzle/?14 答題時限: 11月９日７ＰＭ－比賽結束（約12月27日） 加分時限: 11月９日７ＰＭ－11月14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）　　 ◆DICE GAME You will play a game of chance with your friend by throwing a dice repeatedly. * Whenever 4 even numbers appear in a row, you will win. * Whenever 4 odd numbers appear in a row, your friend will win. * Whenever 5 even numbers appear (may not be in a row), your friend will win. * If first and third condition occur at the same time, first condititon has the priority. What is your probability of winning the game? (Enter your answer as a reduced fraction. Example: 123/4567) 你和你的朋友玩一個遊戲, 重覆投擲一個骰子。 * 如果連續出現四個偶數, 你贏。 * 如果連續出現四個奇數, 你的朋友贏。 * 如果出現過五個偶數 (不一定連續), 你的朋友贏。 * 若第一和第三個條件同時滿足, 第一個條件優先。 試問你贏的機率為何? (以最簡分數回答，如 123/4567。) -- 'You've sort of made up for it tonight,' said Harry. 'Getting the sword. Finishing the Horcrux. Saving my life.' 'That makes me sound a lot cooler then I was,' Ron mumbled. 'Stuff like that always sounds cooler then it really was,' said Harry. 'I've been trying to tell you that for years.' -- Harry Potter and the Deathly Hollows, P.308 --

※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 123.195.9.46 ※ 文章網址: https://webptt.com/m.aspx?n=bbs/puzzle/M.1510271096.A.45B.html