perplexus.info :: Probability : Red ball... Red ball

Red ball... Red ball (Posted on 2002-10-17)

If you take two balls randomly out of a jar of colored balls, there is a 50% chance that the balls will both be red.

What is the total percentage of red balls in the jar?

See The Solution Submitted by levik

Rating: 3.1538 (13 votes)

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Puzzle Thoughts	K Sengupta	2023-12-22 19:47:11
Puzzle Answer	K Sengupta	2022-09-03 22:15:56
re: Another solution (re: a mathematecally more rigorous solution)	Ady TZIDON	2015-08-22 03:34:06
Not everything appears as it seems	Dej Mar	2011-09-13 03:24:48
I do not agree with the official solution	ajosin	2005-03-04 19:53:25
Comment on official solution	Nick Hobson	2004-09-18 18:20:52
re: solution - and my own one	sassy	2004-05-13 19:36:19
easy	Billy Bob	2004-03-28 10:22:38
Red ball... Red ball	Paula Bilton	2003-08-14 08:16:42
(easy) Solution	Chaz	2003-05-03 14:41:37
Another solution (re: a mathematecally more rigorous solution)	Charlie	2003-02-17 14:36:06
solution	Keedom	2002-11-18 23:43:54
Answer	Dulanjana	2002-10-18 17:11:03
is this right?	hai	2002-10-18 17:02:51
a mathematecally more rigorous solution	TomM	2002-10-18 02:46:53
typo	TomM	2002-10-18 00:07:54
Exactly!	TomM	2002-10-18 00:01:45

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