Problem 1272. The almost-birthday problem.

This is a harder version of the birthday problem. Now, you will have to determine the probability that two or more people in a randomly assembled group of n people are having their birthdays within d days of each other. As usual, ignore the leap year and assume that every day is equally probable.

Solve

Solution Stats

30.36% Correct | 69.64% Incorrect
Last Solution submitted on Dec 10, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers26

Suggested Problems

More from this Author13

Problem Tags

birthday probability

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!