The average weight of 8 men is increased by 2 kg when one of them, whose weight is 90 kg, is replaced by another man. What is the weight of the new man?
Answer & explanation
Correct answer: option 4
Let average weight of 8 men is x
Total sum of weight = 8x
New average = x + 2
Sum of new weights = 8(x + 2)
90 kg is replaced by other, let it be y
so, 8x - 90 + y = 8(x + 2)
y = 106 kg