The Birthday Paradox

The Birthday Paradox

If there are 30 people in a room, what is the probability that at least 2 of them share the same birthday?

Most people would tell you that the probability is about 1 in 12. But in fact, it's much higher.

I choose numbers randomly.

Each number has possible values.

What is the probability that at least two of them are the same?

Show all calculations

Written in PERL by Jeff Aaron.