(38*50)-55-45 = 1800 1800/48 =37.5
(50 x 38)-100 divided by 48=37.5
The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then what is the weight of B?
The average weight of 19 students was 50 kg. By the admission of a new student the average weight is reduced to 49.6 kg. What is the weight of the new student?
When a boy weighing 47 kg left a group, the average weight of the remaining 49 students increased by 300 g. What is the average weight of the remaining 49 students?
