there are two sections A and B of 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 weight of the whole class?  Choose the correct choice from the following options
A) 15.42 B) 37.25 C) 12.54 D) 32.37 E) 23.47
Sol: total weight of(36+44) students=(36*40+44*35)= 
<gadget id="calculator">(36*40+44*35)</gadget>
<output>2_980</output>
2980kg.   Therefore weight of the total class=(2980/80)= 
<gadget id="calculator">(2980/80)</gadget>
<output>149/4 = around 37.25</output>
37.25kg.   Ans: 37.25
<result>B</result>
there are two sections A and B of 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 weight of the whole class?