Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.: ^( j% Z- s# P' e/ T
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.1 e& _+ B6 e, ?; D3 A, q- j
 |