jacky101mm

Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.
2 K! f* Z7 W' 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.
0 _* b+ ]" E8 Z, i1 h1 S