Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.8 M" W" e3 V6 d& v) 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.! Q: H0 r. t6 Y" G V* |- m