Question

The average weight of A, B and C is
80 kg. If D joins the group, the
average weight becomes 84 kg.
When E joins the group, the
average weight becomes 3 kg more
than the group, where D replaces
A. Find the weight of A.​

Answer 1

Answer:

When the D joins it becomes 4 kg more so A is 4 kg.

Hope it helps!

But I am somewhat in doubt!