# There are 50 students in a class. Their average is 45 kg. When one student leaves the class the average weight reduces by 100 gram. What is the weight of the student who left the class?

 [ A ]    45 kg [ B ]    47.9 kg [ C ]    49.9 kg [ D ]    50.1 kg
 Answer : Option C Explanation : ATQ, The weight of students who left the class = 45 + $49X100\over1000$ = 45 + 4.9 = 49.9 kg