问题标题:
【一道数学概率问题英文题目哦(a)Inthenationallottery,youidentify6ballsfromasetof49balls.Then6ballsareselectedatrandomfromthe49ballsandyougetaprizeifatleast3ofthesematchtheballsyouidentified.(Ignori】
问题描述:

一道数学概率问题英文题目哦

(a)Inthenationallottery,youidentify6ballsfromasetof49balls.Then6ballsareselectedatrandomfromthe49ballsandyougetaprizeifatleast3ofthesematchtheballsyouidentified.(Ignoringthebonusballfornow)

---Whatistheprobabilitythatyougetaprizeofsomesort?

(b)actuallyitismorecomplicated;afterthe5ballsareselectedatrandom,asixth“bonus”ballisselectedatrandomandyougetaspecialkindofprizeif,ofthesixballsyouidentified,5wereintheselectedgroupofsixandthesixthisthebonusball(aswellasalltheprizesformatching3ormoreofthefirstsixballs)

---Whatistheprobabilityyougetaspecialkindofprizejustdescribed?

---Keepingthisinmind,whatistheprobabilitythatyougetaprizeofsomesort?

单乐生回答:
  Solution(a):Ifthisproblemneedn'tarrangeallballsinasequence.3_balls:1/184244_balls:1/2118765_balls:1/19068846_balls:1/13983816(b):Theprobabilitythatgetaspecialkindofprizeis1/44;Witho...
查看更多
数学推荐
热门数学推荐