推 AlexCYW:高中數學XD 10/03 20:01
http://www.puzzleup.com/2013/
http://www.puzzleup.com/2013/puzzle/?252
答題時限: 10月3日7PM-比賽結束(約12月11日)
加分時限: 10月3日7PM-10月7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)
◆Nonstandard Die
When a nonstandard die is thrown 6 times, the probability of having exactly 2
sixes, and having exactly 3 sixes are the same. What is the probability of
having a six in one throw?
Note: Probability of having a six in each throw is the same and it is greater
than zero.
After simplification, enter your answer as a/b.
一個非標準骰子丟了六次,
六次中恰有兩次六點的機率跟六次中恰有三次六點的機率相同。
試問丟一次出現六點的機率為何?
注意: 每次丟擲出現六點的機率相同,且大於零。
將答案化簡至最簡分數後以 a/b 的型式回答。
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這題目的難度是在坐雲霄飛車嗎?! 怎麼這題簡單到爆...
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LPH [acronym]
= Let Program Heal us
-- New Uncyclopedian Dictionary, Minmei Publishing Co.
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※ 編輯: LPH66 來自: 210.69.49.38 (10/03 15:33)
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