Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.) p" f$ M& m* H! {2 ` B! W
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. , Z' h# I9 v- G$ P