Birthdays

[DST]

Just an observation, given that this forum has 24571 members, it's a good thing almost none of them entered their birthdate when they registered. If they had, we'd have an average of 67 birthdays every day. That'd be a list!

[Bee-Ant]

They joined in order to download GE.
Further info is not necessary.
Then who their birthday appear are the REAL forum member.

[j2graves]

I didn't put my birthday. does that mean I'm not a real member?

JK

[Bee-Ant]

You didnt?

Ah, I mean the REAL member is the one who give every info to this site

Btw, I dunno how long I would last...
I have spent almost 3 years here,my closest friend is not here anymore

[j2graves]

don't be leaving GE

[Bee-Ant]

J k

[j2graves]

lol

You didnt?

Ah, I mean the REAL member is the one who give every info to this site

I didn't give any info

[Bee-Ant]

Thats why you're here seldomly...

[jhntailor87]

hi everyone,
birthday is exciting day for eny one.specially for childrens,they decorates and invites some relatives for some specially arranged programe.people enjoyed music with eating dinner.


thanks

[MrJolteon]

Here's something to think of:

If 365 people was in the same room(A big one, would that be), what would the chance be that all of them had their birthdays on different days?

[DST]

Each person has 365 possibilities for their birthday. That means the total combination of people and birthdays is 133,225.

So that's your chances.

[Bee-Ant]

Each person has 365???
I think one person has 1...since he born once...

[MrJolteon]

@DST Or simplified: The chance of everyone have their birthdays on different days is one by 365.

[DST]

When you meet a person, you don't know their birthday yet. It could be any of 365 days. That's for each person.

so 365 * 365 is your answer.

Same thing with security codes. If you have a 12 button keypad, and the code is 5 digits long, then the possible combinations of the code are 12 * 12 * 12 * 12 * 12. 248832 combinations.

If your name is 5 letters long, there are 26 *26*26*26*26 combinations possible. Of course, that would include AAAAA and ZZZZZ.

That's why credit cards have a 16 digit number. If you were to make up a credit card number, its unlikely it would even actually be a real card number. IP addresses....255*255*255*255 possibilities....

[Fuzzy]

You are wrong about the birthdays. In a room of 356 people, there is a very huge chance that two people will share a birthday.

The first person has one day out of 365 or 1/365.

Now for the second person to have a different birthday, they can only have a birthday on 1 out of 354 remaining days.

Third, 1/353 (because they cannot share with the other two..)

So by the halfway point, 183rd person, there are only 182 days free that dont have another birthday person. That is about 50% chance that they DO have someone elses birthday.

By the last person, 354 birthdays are taken! They only have a 1/365 chance of having their own birthday.

Chances are, more than two people have the same birthday. QED.

Remember than when you are using rand().