Based on that info, Oct-Dec seems to be the happening time in the bedroom But does (1 / 365)^2 take into account that Bill's birthday (day i) is known?I live in the UK, we have a population of about 60 million people.If you have 30 people, all born in the same 365-day calendar year, what is the probability that any two of them will have the same birthday? Scott from Madison, Indiana Think of the 30 people as lined up.The probability the second person doesn’t match the first person is 364/365.The odds of BOTH Andy and Bill having a birthday on Feb 18th? If Bill and Andy are unrelated then Pr[ Bill on day i and Andy on day i ] == Pr[ Bill on day i ]Pr[ Bill on day i ] ==(1/365)^2 However, I Bill and Andy are twins, then Pr[ Bill on day i and Andy on day i ] == 1.
One is that when in a room with 22 other people, if a person compares his or her birthday with the birthdays of the other people it would make for only 22 comparisons—only 22 chances for people to share the same birthday.So the probability of at least one birthday match is 41.1438%.Also, 23 is the fewest number of people needed for the probability of a match to be greater than 50%.Or for both to be on the same week is , or for both to be during a specific week 7 ???? But the day has not been determined in this problem. The odds of Andy having a birthday on Feb 18th is 5.I'm also having low blood sugar from dieting, so excuse my stupidity. The odds of Bill having a birthday on Feb 18th is 5.