There are 2 sections A and B in a class, consisting of 36 and 44 students respectively. If the average weight of section A is 40kg and that of section B is 35kg, Find the average of the whole class?  Choose the correct choice from the following:  A) 35.29 kg  B) 37.25 kg  C) 42.45 kg  D) 55.12 kg  E) 29.78 kg

Rationale: total weight of 36 + 44 students = 36 * 44 + 44 * 35 = 2980 average weight of the class is = 2980 / 80 = 37.25 kg answer is b
Answer: B