WONDER #1757: What Is the Birthday Paradox?

Question 1 of 3

How many people do you need in a room to have a better-than-50% chance that two of the people will share a birthday?

1. 364
2. 183
3. 23
4. 75

Question 2 of 3

Is the birthday paradox a logical paradox?

1. yes
2. no
3. certainly
4. definitely

Question 3 of 3

How many people do you need in a room to have a 99.9% probability that two people will share the same birthday?

1. 367
2. 183
3. 23
4. 70

Check your answers online at https://wonderopolis.org/wonder/what-is-the-birthday-paradox.