Question

The average weight of 19 student is 15 kg. By the admission of a new student the average weight is reduced to 14.8kg. the weight of new student is ?

Answer 1

the required answer is 11 kg

Answer 2

19 boys = 15 kg ....(1)
19 boys+1 boy = 14.8 kg
sub, (1)
15 kg + 1 boy = 14.8 kg
1 boy = 15-14.8
1 boy = .2 kg