Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.
' `6 b' V; K+ ?, E8 y& _公仔箱論壇The problem is we don't know the weight of each individual ball, so it will not be accurate to figure out which ball is irregular by only weight them once.1 N# d* C2 S/ s- K
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