The average weight of 20 students in a class is decreased by 500 grams when one of the students who weights 40 kg is replaced by a new boy. The weight of the new boy is

A. 35 kg
B. 40 kg
C. 30 kg
D. 50 kg

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.