1 套 52 張的 Play Cards , - 啤 牌 -
Question : 要 Random 抽 2隻， 其中 1隻 是 -紅心 A-及 任何 1 隻 K ，
Black Jack 機會是 多少 ?
Maya問: Play Cards 問題 ?
2006-10-26 11:10 pm
回答 (2)
2006-10-26 11:15 pm
✔ 最佳答案
1隻是紅心A及任何1隻K:P=(1C1)X(4C1)/(52C2)
Black Jack:
P=(4C1)X(16C1)/(52C2)
2006-10-26 11:32 pm
P(其中一隻是紅心A及任何1隻k)=P(1st 紅心A and 2nd K) + P(1st K and 2nd 紅心A)
=2 x 1/52x4/51 = 4/1275
P(Black Jack)= P(1st is A and 2nd is a card of 10 or above) + P(1st is a card of 10 or above and 2nd is A)
= (4/52)x(16/51) + (16/52)(4/51) = (2x4x16)/(51x52) =64/1275
=2 x 1/52x4/51 = 4/1275
P(Black Jack)= P(1st is A and 2nd is a card of 10 or above) + P(1st is a card of 10 or above and 2nd is A)
= (4/52)x(16/51) + (16/52)(4/51) = (2x4x16)/(51x52) =64/1275
收錄日期: 2021-04-20 18:31:50
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061026000051KK01715