There are two groups A and B of a class, consisting of 42 and 28 students respectively . If the average weight of group B is 40 kg, find the average weight of the whole class.

• In the question the Average weight of A is not given,
  Let Suppose Average wt of A is 25 then,
  (42*25+28*40)/70=(1050+1120)/70 is 31 kg.
  So the Average weight of whole class is 31kg
• 7 years agoHelpfull: Yes(1) No(1)