What is the probability of same birthdays in a family?

Question:

What is the probability of same birthdays in a family?

What is the percentage of families having members with the same birthday?

Best Answer - Chosen by Asker: simple ( except for siblings less than 1 year apart in age ) 365 days in the year THE ODDS of being born on any day is 1/365 with two people 2/365 ( the same birthday ) till you get to 365/365 so in a group of 365 the odds are 100%