Question
The average mass of a group of children is 46 kg. If one more child who weighs 80 kg joins the group, the new average mass of the group will become 48 kg. Find the total number of children in the group.
3 m

Click button first when a symbol is required. X

The average mass of a group of children is 46 kg. If one more child who weighs 80 kg joins the group, the new average mass of the group will become 48 kg. Find the total number of children in the group.