Question

The average weight of 5 men is 67.5 kg, and the average weight is diminished by 7.5 kg when the weight of a boy is included. What is the weight of the boy?

Options

• 22.5 kg

• 30 kg

• 25 kg

• 20 kg

Answer 1

22.5 kg
Explanation:
Total weight of 5 men = 67.5 kg x 5 = 337.5 kg
 New average weight = 67.5 - 7.5 = 60
       Total new weight = 60 x 6 = 360
∴  Weight of new boy = 360 - 337.5
                                   = 22.5 kg