The average weight of 10 parcels is 1.5 kg. If a parcel weighing 2.5 kg is replaced by a new parcel, the average weight becomes 1.6 kg. What is the weight of the new parcel?
Show answer & explanation
Correct answer: A
Explanation
Total weight of 10 parcels = 10 × 1.5 = 15 kg
New total weight = 10 × 1.6 = 16 kg
Therefore, increase in total weight = 16 − 15 = 1 kg
Weight of the old parcel = 2.5 kg
Weight of the new parcel = 2.5 + 1 = 3.5 kg