Stats probability help

[Nikesh]

What is the probability that out of 23 randomly chosen people at least 2 shares a birthday?
All the 365 days are equally likely and ignore leap years?????????? :shock:

 

[Rajendra bogati]

1- {(p=0)+(p=1)+(p=2)} where N=364 use binomial distribution.....

 

[Nikesh]

sorry i could not get your logic could u plz elaborate it!!!!!!!!!!!!!!!

 

[Cceer]

Isn't this the question of the text book ?

Hint is given that: 2 people have different birthday, 3 people have different birthday and so on...

I also didn't get the exact meaning of it...

Asked your teacher ??? Otherwise I can ask ...

 

[Nikesh]

ya its the same question!!!!!!!!!!!!!!!!