There are 2 sections A and B in a class, consisting of 30and 20 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?
Pick
A) 35kg  B) 37kg  C) 42kg  D) 38kg  E) 29.78kg
Total weight of 36+44 students = 30*40 + 20*35= 
<gadget id="calculator">30*40 + 20*35</gadget>
<output>1_900</output>
1900   Average weight of the class is= 1900/50= 
<gadget id="calculator">1900/50</gadget>
<output>38</output>
38 kg   Answer is 38kg
<result>D</result>
There are 2 sections A and B in a class, consisting of 30and 20 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?