→ Ricestone: 不對，你寫的算式是兩個獨立的chip在一週裡面各自都只 12/04 02:52
→ Ricestone: 壞8次以內的機率 12/04 02:53
→ Ricestone: 這題應該要算這種chip在七週裡面發生三次以上壞掉的機 12/04 02:54
→ Ricestone: 率 12/04 02:54
→ edward0887: R大我懂了 非常謝謝您！！！ 12/04 03:20
SSI chips, essential to the running of a computer system, fail in
accordance with a Poisson distribution with the rate of one chip
in about five weeks. If there are two spare chips on hand, and if
a new supply will arrive in eight weeks, what is the probability
that during the next eight weeks the system will be down for a
week or more, owing to a lack of chips?
在網路上也看到這題 但好像沒有正確的答案
不知道小弟這樣解對不對
將兩個chip當作獨立事件討論
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 42.72.147.18 (臺灣)
※ 文章網址: https://www.ptt.cc/bbs/Grad-ProbAsk/M.1575395717.A.DC9.html
※ 編輯: edward0887 (42.72.147.18 臺灣), 12/04/2019 01:55:50
https://i.imgur.com/fYSzeqn.jpg
※ 編輯: edward0887 (42.72.147.18 臺灣), 12/04/2019 02:19:12