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0 Q& [, W3 V, e- ]
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.5.39.217.77. }0 R' y2 ?8 u& W
 |
發表於 2008-10-15 03:38 PM
| 