What is the probability that if there are four people in a r

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/06 11:14:55

What is the probability that if there are four people in a room,at least two of them have the same birth month?
一个房间有4个人,最少2个人生日是同月的概率是多少

这个问题可能需要在每个人的生日月份概率都是1/12的前提下进行（要不然按365天平均的概率就算死了…）
4个人的生日月份可能性有12*12*12*12=20736
最少2个人生日同月份,反面是“4个人生日在不同的4个月”,可能性有：12*11*10*9=11880
所以最少2个人生日同月份的概率是1-12*11*10*9/(12*12*12*12)=41/96
希望我的概率和算术还没有退化到一定程度= =

What is the probability that if there are four people in a r 句子改错 what are six and four is there a black board in the cla 统计学概率If three far dice are rolled,what is the probability th 1：Jim is good at sports. 2: There are four people in the pic there are four people in the team,( )( )反意疑问句 There are four people in the my family的疑问句 There are four people in the family.同义句. what is the probability that a prime number is less than 7,g 英语阅读题 100分There are four people in the twins’ family .They a what is the probability that the download time w What is the probability that a bridge hand contains at least 求一道概率题?what is the probability that a normal random variable