Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.公仔箱論壇! h( H+ z: k/ T8 r$ y- P- a0 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. * p% z' o8 F% P: ?2 C