Set Breaker #17: Sharing Birthdays

The Setup

There are two soccer teams (plus a ref) on the field. That’s 23 people. What is the probability that two of these people share the same birthday?
Is it more than:
0.5% (1 in 200)
5% (in 20)
10% (1 in 10)
50% (1 in 2)?

Take me to The Set Breaker