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 Black and White (Posted on 2003-02-25)
Imagine that you have three boxes, one containing two black balls, one containing two white balls, and the third containing one black ball and one white ball.

The boxes were originally labelled for their contents (BB - WW - BW) but someone has inadvertently switched the labels so that now every box is incorrectly labelled.

Without looking inside, you are allowed to take one ball at a time out of any box that you wish, and by this process of sampling, you are to determine the contents of all three boxes.

What is the smallest number of drawings needed to do this?

 See The Solution Submitted by Ravi Raja Rating: 3.1250 (8 votes)

 Subject Author Date Puzzle Solution K Sengupta 2021-12-31 23:28:26 answer Stephen Ticsay 2005-10-29 13:52:41 answer gabbo 2004-09-15 22:46:12 Balls! Denis Cronin 2003-09-21 20:32:49 No Subject Caitlin 2003-07-29 16:55:13 Solution Lewis 2003-06-21 08:23:18 re: I believe it to be... Nich 2003-06-10 08:06:40 umm my guess again Jon 2003-04-11 05:57:33 re(3): what do you mean not the answer? Ravi Raja 2003-03-01 22:00:30 re(2): what do you mean not the answer? Lucifer 2003-03-01 09:13:50 re: what do you mean not the answer? Ravi Raja 2003-02-28 19:14:15 re: Ravi Raja 2003-02-28 19:11:13 re: hi Ravi Raja 2003-02-28 19:08:57 re: i believe, does anyone? Ravi Raja 2003-02-28 19:06:08 No Subject Lucifer 2003-02-28 12:33:05 what do you mean not the answer? Lucifer 2003-02-28 12:30:50 hi Gale 2003-02-28 10:56:25 i believe, does anyone? fad 2003-02-28 01:48:08 re: up a tree Ravi Raja 2003-02-27 20:25:34 re: I believe it to be... Ravi Raja 2003-02-27 20:17:43 re: up a tree Lucifer 2003-02-27 13:35:30 I believe it to be... Lucifer 2003-02-27 13:32:58 up a tree Seth Sauer 2003-02-26 05:59:13 re: ballroom dancing E Woodford 2003-02-25 05:22:42 ballroom dancing Nick Murray 2003-02-25 02:07:09

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