The question is:
What is the minimum number of people you need, so that if you randomly select any two people from that group, there is a 50% chance that their birth dates will be the same?!!
2007-10-21 11:30:39 · 2 answers · asked by shish_101 3 in Science & Mathematics ➔ Mathematics
If you just select two people from a group it is the same as going into the street and selecting two people . It is never going to be 50 - 50.
I think the question should read what is the minimum number of people you need so that at least two of the group will share the same birthday with at least 50-50 probabability .
The answer is either 23 or 24 can't remember which it is.
2007-10-21 11:36:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Do a google search on the exact phrase "the birthday problem" , containing the word "probability", and you'll find lots of explanations of this. I've included one in the link below.
2007-10-21 18:37:34 · answer #2 · answered by Michael M 7 · 0⤊ 0⤋