Understanding the Birthday Paradox and Probability

What is the probability that two people in a group of 44 share a birthday?

• 25%

• 50%

• 93%

• 10%

How many people are needed in a room to have a greater than 50% chance of sharing a birthday?

• 44

• 100

• 23

• 365

How many times would you need to fold a piece of paper to reach the moon?

• 100

• 42

• 20

• 10

To have a 90% chance of someone sharing your specific birthday, how many people are needed?

• 365

• 500

• 1000

• 840

How many friends would you need to have a 90% chance of covering every birthday of the year?

• 10,000

• 21,000

• 2,153

• 365