If the average weight of students of class A is 32kg and that of class B is 36kg. If 12 students are transferred from class A to class B, the average of class B becomes 35.5kg and that of class A becomes 30.5 kg. What can be the average weight of these transferred students? (a)38.5kg (b)32kg (c)36kg (d)34kg (e)None of the above.