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

Home > Logic
A red herring marble (Posted on 2012-05-01) Difficulty: 1 of 5
An urn contains 3333 marbles : 2001 black,999 white and 333 red.
You are requested to draw randomly a pair of marbles and to obey the following rules:
If none of them is red - discard both of them.
If only one of the marbles is red – discard the non-red marble and return the red one to the urn.
If both are red - discard both of them.

Continue drawing pair by pair and discarding as told until there is only a single marble left.

What is the probability of the last one being red?

See The Solution Submitted by Ady TZIDON    
No Rating

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionOne fish two fish red fish blue fish (solution)Jer2012-05-01 12:11:34
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 (14)
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