The birthday problem
In a room of 23 people, is the probability that at least two share a birthday closer to 50% or to 5%? Explain.
Show hints (2)+
- It's easier to compute the probability that all birthdays are distinct.
- Think about the number of pairs, not the number of people.
Answer
This is an open-ended question — work through it and compare your reasoning.
Want the full step-by-step worked solution? It's part of Premium — along with a worked solution for every question in the bank.
Asked at: Jane Street, SIG