Question

Players are selected for Judo based on their body weights from the following 10 weight groups:
1. (48 kg - 52 kg)
2. (52 kg - 56 kg)
3. (56 kg - 60 kg)
4. (60 kg - 64 kg)
5. (64 kg - 68 kg)
6. (68 kg - 72 kg)
7. (72 kg - 76 kg)
8. (76 kg - 80 kg)
9. (80 kg - 84 kg)
10. (84 kg - 88 kg)
The average weight of the players after selecting one player from each group is 68 kg. If one of the players (named S) leaves the team, their average weight comes down to 66.5 kg