# Probability

A group of 30 people gather in a room. What is the probability that at least 2 of these people have the same birthday? The year of birth is not considered; having the same birthday means two peple were born on the same day of the year.

Â© BrainMass Inc. brainmass.com March 4, 2021, 5:54 pm ad1c9bdddfhttps://brainmass.com/statistics/probability/probability-17176

#### Solution Preview

Solution. We consider one year has 365 days. Then there are 365*365*...*365=365^30 possible cases for these 30 people's birthdays since each of ...

#### Solution Summary

A group of 30 people gather in a room. What is the probability that at least 2 of these people have the same birthday? The year of birth is not considered; having the same birthday means two peple were born on the same day of the year.

$2.49