Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group. ( @/ ^" Q9 y) x$ ]5 x2 k& r1 kThe 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.公仔箱論壇+ p4 `6 y" q7 V& N3 B6 _