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 Multicolored Coins (Posted on 2006-05-24)
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)

 Subject Author Date Answer K Sengupta 2008-10-02 01:10:58 My attempt at solution Josie Faulkner 2006-06-04 09:35:49 Not sure yet Josie Faulkner 2006-06-04 06:21:45 my answer is .......................... Amanda 2006-06-04 05:11:26 Solution Chance 2006-06-01 21:29:18 The 3 coins Gina Ernyey 2006-05-25 18:06:52 re: Solution (with expl) Charlie 2006-05-24 11:55:33 Solution (with expl) iamkobe 2006-05-24 10:42:37 Heads or Tails? Dej Mar 2006-05-24 10:09:33 Solution, no expl. Jer 2006-05-24 09:09:39

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