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woshigsw (砍砍砍) 于 (Wed Feb 27 03:52:31 2008) 提到:
4 balls in a bin of 4 different color. Draw two balls and paint second color
to match first. Put back and draw two again and do matching paint if apply.
What is mean number of drawing needed to get uniform color of 4 balls?
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hateit (nonickname) 于 (Wed Feb 27 05:42:53 2008) 提到:
simulation tells me it is 9. :-)
