The average weight of a group of (x – 6) labour is (x + 7) kg. If a Supervisor of weight 63 kg joins the firm, then average weight of the group is increased by 2 kg. Find the strength of the group excluding the Supervisor.
1
16
2
8
3
10
4
12
The average weight of a group of (x – 6) labour is (x + 7) kg. If a Supervisor of weight 63 kg joins the firm, then average weight of the group is increased by 2 kg. Find the strength of the group excluding the Supervisor.