The Average weight of 50 boys in a class is 45kg.When one boy leaves the class,the average reduced by 100gm.Find the weight of the boy who left the class?
Avg weight =45kg Avg weight reduced =100gm =0.1kg New Avg. =45.0-0.1=44.9kg Weight of boy left =new Avg. - no of old members x change in avg =44.9-(50*0.1) =44.9+5=49.9kg Ans:weight of boy left is 49.9 kg
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?
The average weight of 31 students of section A of a class is 53 kg, whereas the average weight of 27 students of section B of the same class is 55 kg. Find out average weight of all the 58 students of the class.
The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
The average weight of a group of boys is 48 kg. If 8 boys of average weight 51 kg leave and 3 boys of average weight of 42 kg join the group, then the average weight of group decrease by 1 kg 50 gm. Find the initial number of boys in a group.
The average weight of 56 students is 56 kg. It was found later that the figure of 45 kg was misread as 54 kg. What is the correct average?
