The average weight of 15 men is decreased by 2 kg when one of them whose weight is 70 kg is replaced by a new man. What is the weight of the new man?

Correct option is D

Average = Sum of all values/No. of values
Let the average of 15 men be x,
and the weight of new man be a.
= 15x - 70 + a = 15(x - 2)
= 15x - 70 + a = 15x - 30
= a = 70 - 30 = 40 kg