Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.7 y# k: _8 |. e' V% I$ O1 A M
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. . F) C: h( U' _& D# E1 A