29 pointsby denismenace8 hours ago3 comments
  • pedrosbmartinsan hour ago
    > What is the probability that you are sharing the same birthday with people around you?

    > What if I told you that in a room with only 23 people there’s already a 50% chance for two of them to have matching birthdays?

    I guess it's the subject shift from _you_ to _any two people from a group_ that creates the surprise in the birthday paradox. You definitely need way more than 23 randomly sampled people to get to a high probability that _you_ specifically share a birthday with one of them, and the result does not contradict that notion.

  • pablowegw3 hours ago
    And what are the odds of your birthday being exactly at the center of the (non-leap) year? That's my B'day. Cool!
    • rossvc2 hours ago
      50/50. Either it is or it isn’t!
  • ChrisArchitect2 hours ago
    Related today:

    Ask HN: We just had an actual UUID v4 collision...

    https://news.ycombinator.com/item?id=48060054