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

Home > Probability
Heavily wounded (Posted on 2017-05-08) Difficulty: 1 of 5
In a group of soldiers,
if 70% have lost an eye,
75% an ear,
80% an arm,
85% a leg,

what percentage, at least, must have lost all four?

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution War is hell (spoiler) Comment 1 of 1
30% have not lost an eye
25% have not lost an ear
20% have not lost an arm
15% have not lost a leg

If there is no overlap between these 4 subsets, then 90% have one part that they have not lost.

That leaves 10% who must have lost all 4.

If there is any overlap, than over 10% have lost all 4.

The answer is 10%

  Posted by Steve Herman on 2017-05-08 08:52:41
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 (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information