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Playing With Marbles (Posted on 2003-10-13) Difficulty: 3 of 5
You choose one of two identical looking bags at random. One bag has three black marbles and one white marble. The other has three white marbles and one black marble.

After choosing a bag you draw one marble out at random. You notice it is black. You then put it back and draw another marble out of the same bag at random.

What is the probability that the second marble drawn is black?

See The Solution Submitted by Ravi Raja    
Rating: 3.0000 (10 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSeven wordsajosin2005-06-20 03:05:41
Some ThoughtsSome Inforgabbo2004-09-15 22:11:19
Solutiona possible answerlogischer Verstand2004-03-21 23:37:55
Figuring out loud.PhatFingers2003-11-09 23:29:35
SolutionPrab2003-11-05 09:07:55
the solutionanand2003-10-17 14:38:05
re: no expertDan2003-10-14 19:40:29
re: no expertCharlie2003-10-14 10:42:40
re: Extension to the problemCharlie2003-10-14 10:37:33
QuestionExtension to the problemTrevor Leitch2003-10-14 07:16:15
no expertnellie2003-10-14 07:05:04
Marble not at this......Dan2003-10-14 03:02:45
marble madnessLee2003-10-14 01:40:40
re(4): Have you lost your marbles ?Dan2003-10-14 00:47:26
Some Thoughtsre(3): Have you lost your marbles ?DJ2003-10-13 22:57:12
re(2): Have you lost your marbles ?Dan2003-10-13 21:15:50
re: Have you lost your marbles ?Brian Smith2003-10-13 21:04:14
Have you lost your marbles ?Dan2003-10-13 20:43:39
Hints/Tipsre: Could be wrongDJ2003-10-13 16:00:08
SolutionSolutionDJ2003-10-13 15:55:18
Some ThoughtsCould be wrongnikki2003-10-13 15:47:36
SolutionSolutionTrevor Leitch2003-10-13 15:25:11
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