Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.+ b& c3 y6 A7 y/ ^+ _
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. ) t* H; g% F4 I3 C4 ]公仔箱論壇