Jun 7, 2011 · Here’s a probability puzzle that asks about this question explicitly. In mathland, companies have to give a holiday to everyone whenever one employee has a birthday. Other …

Jan 3, 2020 · Suppose we have 20 people in a room. Ignoring leap years (and treating each calendar day as a number from 1 to 365), we can simulate their birthdays with sample(365, 20, …

Oct 29, 2011 · The probability that two pairs of birthdays are shared is the probability that the employees' birthdays are shared (a 1/365 chance) and the spouses' birthdays are shared …

To get the probability mass function for the number of holidays h h, I need to count the number of events where the number of holidays is h h. This occurs when there are h h days with at least …

Jan 18, 2023 · Puzzle: On a new year day, two old friends (A and B) meet at a party. As they met after a long time person B wanted person A to guess his birthday. As both friends are not in …

Many people mix the birthday paradox with the following question, which is NOT the same: What is the probability that in a given set of n randomly chosen people, at least one of them has the …

Jun 27, 2013 · There are about 150 employees at SparkFun these days. What are the odds of this unexpected coincidence? More generally: how many people, on average, do you need in a …

Dec 24, 2014 · There are 365r 365 r possible arrangements of birthdays for the r r people, all of which we assume are equally likely. The number of arrangements in which the birthdays are …

Jul 7, 2021 · Consider the following question: Given a number of persons. Each person p knows n(p) other persons – p 's neighbourhood N(p). Knowing a person p ′ ∈ N(p) may imply (as an …

Aug 15, 2020 · You want to find out what number of people share the same birthday, or better still, share it with you. Assuming that these people are randomly chosen and have birthdays …