what is the probability of at least 2 people in the class sharing the same birthday?in a hurry!

来源：学生作业学帮网 编辑：学帮网 时间：2024/05/25 17:03:34

what is the probability of at least 2 people in the class sharing the same birthday?
in a hurry!

如果班级总人数为n
那么所有可能地情况为365^n
要求至少两人同一天出生的概率,可以从反面考虑,也就是求出没有两个人同一天出生,也就是所有学生的生日都不相同,这种情况的总数为A（365,n）,所以至少两人是同一天出生的概率为
1-[A(365,n)/365^n]
仅供参考

It is depend on how much people the class have. If we consider that the number of people is N.
Then
Posibility=1-365*(1/365)^N.
不好意思，做错了。

两个同班同学同时一天生日的可能性…

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