There are two batches A and B of a class. Batch A consists of 36 students and batch B consists of 44 students. Find the average weight of whole class, if average weight of batch A is 40 kg and that of batch B is 35 kg. Select.
A) 29.23 kg  B) 32.56 kg  C) 35.66 kg  D) 37.25 kg  E) NONE OF THE ABOVE
Given: Average weight of batch A = 40 kg , average weight of batch B = 35 kg   1) First find the total weight of all students   - Weight of batch A = (36 x 40) = 1440   - Weight of batch B = (44 x 35) = 1540   Total weight of all students = (1440 + 1540)= 
<gadget id="calculator">(1440 + 1540)</gadget>
<output>2_980</output>
2980 kg   2) Find average weight of whole class   (Batch A + Batch B) students= (36 + 44)= 
<gadget id="calculator">(36 + 44)</gadget>
<output>80</output>
80 students   Average Weight=	Total weight of all the students /	No. of Students   = 2980 / 80= 
<gadget id="calculator">2980 / 80</gadget>
<output>149/4 = around 37.25</output>
37.25 kg   ANSWER IS 37.25 kg
<result>D</result>
There are two batches A and B of a class. Batch A consists of 36 students and batch B consists of 44 students. Find the average weight of whole class, if average weight of batch A is 40 kg and that of batch B is 35 kg.