Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group. 3 _9 H( j; i7 }; O5 Q. w8 a6 h! DThe 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. 7 U7 B& Z1 ^& K' {