更新1:
May I ask you a simple question?Why is it (1/9)X(1/2)+(8/9)(0)=1/18?
Statistic
2013-02-25 9:50 pm
There is a 50-50 chance that the queen carries gene for hemmophilia.If she is a carrier,then each prince has a 50-50 chance of having hemophilia.If the queen has had three princes without the disease,what is the probability that the queen is a carrier ?If there is a fourth prince,what is the probability that he will have hemophilia?
回答 (1)
2013-02-28 5:35 am
✔ 最佳答案
--------------------------------------------------------------------------------------------------圖片參考：http://i1090.photobucket.com/albums/i376/Nelson_Yu/int_zps52491951.jpg
2013-02-28 19:55:49 補充：
From the first part, the probability of the queen being a carrier = 1/9; not a carrier = 8/9
If the queen is a carrier, the pr that the 4th prince has the disease = 1/2
if the queent is not a carrier, the pr that the 4th prince has the disease = 0
Hence the required pr = (1/9)(1/2) + (8/9)(0) = 1/18
收錄日期: 2021-04-24 10:17:04
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130225000051KK00141