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 Common Birth Dates II (Posted on 2021-11-17)
Common Birth Dates asked for the expected number of pairs of common birth dates for a cohort of 1000 people whose ages were clustered around a certain value.

Now consider a similar question to the traditional birthday problem: If you attend a concert or other event where people tend to be of a similar age, how large would such an event need to be in terms of number of attendees, so that you'd have at least a 50% probability that there would be at least two people born on the exact same day (year, month and day)?

Again to make things specific: assume the standard deviation about whatever the mean age to be is 12 years and it follows a normal distribution.

Again feel free to vary the assumptions about the distribution.

 See The Solution Submitted by Charlie Rating: 4.0000 (1 votes)

 Subject Author Date Puzzle Answer K Sengupta 2022-05-11 21:56:15 One more examination Steven Lord 2021-11-21 14:58:59 explanation of discrepancy Steven Lord 2021-11-19 10:16:47 analytic attempt Steven Lord 2021-11-18 07:29:10 No Subject Steven Lord 2021-11-17 22:25:42

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