A scale is balanced when both sides have equal weight. Then add the weights correctly on both the sides to balance the scale.

A. Add A on the left and B on the right.
B. Add B on the left and A on the right.
C. Add A on the both sides.
D. Add B on the both sides.

Answer: A

Solution:
Let’s compare the numbers on scale on both sides

To balance the scale we need,

Left Hand Side = Right Hand Side

When we place 3 on the left side and 5 on the right side,

Then,

11 on both sides make the scale equal.