Real Challenge 4.4.3.
When two cards are drawn from a usual deck of 52 poker cards, what is the probability of getting a "blackjack"? (That is, an ace together with a K, Q, J or 10)
Answer:
Real Challenge 4.4.3.
2009-04-23 3:43 am
回答 (2)
2009-04-23 4:43 am
✔ 最佳答案
When two cards are drawn from a usual deck of 52 poker cards, what isthe probability of getting a "blackjack"? (That is, an ace togetherwith a K, Q, J or 10)SOL
分母=C(52,5)=52!/(5!*47!)=52*51*10*49*2
分子=C(4,1)*C(4,1)*C(4,1)*C(4,1)*C(4,1)=4^5
P=分子/分母
=4^5/(52*51*10*49*2)
=64/162435
Answer:
2009-04-24 2:11 am
Required probability
= 4C1 * (4*4C1) / 52C2
= 32/663
= 4C1 * (4*4C1) / 52C2
= 32/663
收錄日期: 2021-04-28 15:17:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090422000051KK01370