The average weight of 50 boys in a class is 45 Kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.
A
50 Kg
B
50.8 Kg
C
49 Kg
D
49.9 Kg
Correct Answer: 49.9 Kg
Total weight of 50 boys = 45 X 50 = 2250
Average weight of 49 boys = 44.9
Total weight of 49 boys = 44.9 X 49 = 2200.1
Weight of boy who left the class=2250–2200.1=49.9