- What is the probability that at least two people in a group of 30 have the same birthday?
- How large would the group have to be for the odds to be about even?

*This classic puzzle requires a little knowledge of probability math and a good calculator.*

- What is the probability that at least two people in a group of 30 have the same birthday?
- How large would the group have to be for the odds to be about even?

*This classic puzzle requires a little knowledge of probability math and a good calculator.*