Question

15) The average weight of eight boxes is increased by
2.5 kg when some goods are added to one of the boxes.
The weight of goods added to this box is
A) 15 kg
B) 10 kg
C) 20 kg
D) NOT determinable​

Answer 1

Answer:

c. 20kg

Step-by-step explanation:

weight of the box is increased by 2.5kg

so, 8x2.5=20kg