A fair coin is tossed repeatedly until either heads comes up three times in a row or tails comes up three times in a row. What is the probability that the coin will be tossed more than times? Express your answer as a common fraction.
有沒有通俗易懂的辦法?
A fair coin is tossed repeatedly until either heads comes up three times in a row or tails comes up three times in a row. What is the probability that the coin will be tossed more than times? Express your answer as a common fraction.
有沒有通俗易懂的辦法?
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29/256. chatgp 4O輕鬆解決,我今天O1 token用完了
-青裁-
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01/04/2025 postreply
14:48:06
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這明顯是錯的。有人給出了答案是89/512 用的是 Fibonacci numbers的辦法
-rapidestate-
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01/04/2025 postreply
14:59:03
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7/256 or 0.1738 ?
-米湯-
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01/04/2025 postreply
15:16:46
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哈哈,chatgpt learned a lot from this example.
-rapidestate-
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01/04/2025 postreply
18:26:34
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好像是不對 ,我想了一下,必須要用遞歸,先算出n=2的,再逐步到n=10,應該是178/1024=89/512
-青裁-
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01/04/2025 postreply
15:21:21
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和o1 給的答案一致
-oryzivore-
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01/04/2025 postreply
15:27:04
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先算反的,少於十次的可能性?
-恒媽-
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01/04/2025 postreply
14:48:46
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反算前幾個容易,到6,7,8次後就很難了
-rapidestate-
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01/04/2025 postreply
14:52:34
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二項式定理。
-其樂無窮-
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01/04/2025 postreply
14:55:44
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二項式定理是回答10次中有幾次是H or T
-rapidestate-
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01/04/2025 postreply
15:00:54
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手列出來,數數。
-alpha123-
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01/04/2025 postreply
15:31:45
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用 simulation 和 Markov Chain 都是 89/512
-run2022-
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01/04/2025 postreply
17:18:21
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但樓主肯定不是要這麽brutal force 的 解法
-run2022-
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01/04/2025 postreply
17:20:56
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答案多少,我算出89/143
-專業潛水媽-
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01/04/2025 postreply
17:44:07
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我用inductive的辦法算的,如果不對,錯到哪兒?
-專業潛水媽-
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01/04/2025 postreply
18:15:56
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Failed 的次數是2*89。所以答案是89/512。思路是正確的。這是我網上查到的解法
-rapidestate-
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01/04/2025 postreply
18:19:19
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知道我錯哪裏了,扔到10沒出來三連是89乘以2,扔十次的總population是2 的10次方=1024
-專業潛水媽-
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01/04/2025 postreply
18:46:18
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simulation code
-run2022-
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01/04/2025 postreply
17:50:31
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markov chain
-run2022-
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01/04/2025 postreply
17:54:11
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我剛學了這個辦法,有圖解碼?
-rapidestate-
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01/04/2025 postreply
18:15:21
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power of transition matrix 本質就是遞歸吧
-run2022-
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01/04/2025 postreply
19:38:48
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寫code寫多了就是這樣, 其實這種tail recursion基本不用遞歸思維, 但是經常寫代碼的人就會很自然的滑進遞
-SabrinaD-
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01/07/2025 postreply
14:46:43
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共有八種連三位,至少一個連三位出現連三H/T的概率,用100%減去它,就是答案了
-賈平凸-
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01/04/2025 postreply
18:02:02
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