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Multicolored Coins (Posted on 2006-05-24) Difficulty: 3 of 5
I have a bag which contains three coins. One of them is red on one side, blue on the other; another of them is red on one side and green on the other; and the third is blue on one side and green on the other.

I would like to lay them out on the table so that one of each color is facing up.

I reach into the bag and randomly select a coin. I flip it onto the table and it lands red side up (you cannot see what color is on the other side).

Not wanting to risk flipping another red side up, I reach into the bag and look for a coin with a green side, and place it green side up on the table (once again you have no idea what color is on the other side).

If I were to take the last coin out of the bag and flip it, what is the probability that it will land with a blue side facing up?

See The Solution Submitted by tomarken    
Rating: 3.3333 (6 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
AnswerK Sengupta2008-10-02 01:10:58
My attempt at solutionJosie Faulkner2006-06-04 09:35:49
Not sure yetJosie Faulkner2006-06-04 06:21:45
my answer is ..........................Amanda2006-06-04 05:11:26
SolutionChance2006-06-01 21:29:18
The 3 coinsGina Ernyey2006-05-25 18:06:52
Solutionre: Solution (with expl)Charlie2006-05-24 11:55:33
Solution (with expl)iamkobe2006-05-24 10:42:37
SolutionHeads or Tails?Dej Mar2006-05-24 10:09:33
Some ThoughtsSolution, no expl.Jer2006-05-24 09:09:39
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