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

Home > Logic
Names in Boxes (Posted on 2017-04-09) Difficulty: 3 of 5
The names of 100 prisoners are placed in 100 wooden boxes, one name to a box, and the boxes are lined up on a table in a room. One by one, the prisoners are led into the room; each may look in at most 50 boxes, but must leave the room exactly as he found it and is permitted no further communication with the others.
The prisoners have a chance to plot their strategy in advance, and they are going to need it, because unless every single prisoner finds his own name all will subsequently be executed.
Find a strategy for them which has probability of success exceeding 30%.

Comment: If each prisoner examines a random set of 50 boxes, their probability of survival is an unenviable 1/2100 ∼ 0.0000000000000000000000000000008. They could do worse—if they all look in the same 50 boxes, their chances drop to zero. 30% seems ridiculously out of reach—but yes, you heard the problem correctly!

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (5 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): This is not possible. | Comment 12 of 15 |
(In reply to re: This is not possible. by Max)

We have read your all the information some points are good . 
Great post I would like to thank you for the efforts you have made in writing this interesting and knowledgeable article.
[b][url=https://play.google.com/store/apps/details?id=com.stories.bedtimeshort]english stories[/url][/b]  [b][url=https://rajsinha898.blogspot.com/2022/02/what-is-factorial-of-100-hundred.html]what is factorial of 100 hundred[/url][/b]  [url=https://rajbiswas146.blogspot.com/2021/02/short-moral-stories.html]english short stories with moral values[/url]


  Posted by Gouri Deb on 2022-07-13 16:31:35
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (11)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2024 by Animus Pactum Consulting. All rights reserved. Privacy Information