In: Statistics and Probability
Suppose you are living on the planet Triskelion with your friends. If all birthdays are independent and all 88 days of Triskelion’s year are equally likely, what’s the probability that there is at least one birthday match among x people in a room? Graph this for x = 2, 3, . . . , 88. In particular, what does x have to be in order to assure at least a 50–50 chance of a match?