All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Probability
Happy Birthday (Posted on 2003-03-27) Difficulty: 3 of 5
Find the least positive integer 'N' so that, in a room containing 'N' people, the odds that two of the people have the same birthday (not the year, just the day) are more than 50%.

[Note: Forget about Leap Year. Assume that a year has 365 days and that people are born randomly throughout the year].

See The Solution Submitted by Ravi Raja    
Rating: 3.8333 (6 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Comment 5 of 5 |
(In reply to by Bart freeman)

Of course, the more people there are in the room the more likely it is to have a match. While 23 (not 22) is the least that will give a larger probability of a match than not, 40 gives even better odds of finding a match. There's no contradiction there.
  Posted by Charlie on 2003-09-29 20:17:37

Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (5)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information