[機統] 找p.m.f

看板Math作者craig100 (不要問,很‧恐‧怖)時間13年前 (2012/04/25 03:36)推噓1(1推 0噓 1→)

留言2則, 1人參與討論串1/1

Let X equal the number of flips of a fair coin that are required to oberserved head-tails on consecutive flips. Find the p.m.f of X (hint: Draw a tree diagram) ans: f(x)=(x-1)/2^x ,x=2.3.4.... 我怎麼畫樹狀圖機率都跟他給的答案不同....? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 119.14.33.204

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playmypig

04/25 19:28, , 1^F

04/25 19:28, 1^F

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playmypig

04/25 19:29, , 2^F

04/25 19:29, 2^F

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