If the average marks of three batches of 45, 50 and 35 students respectively is 40, 50,55, what is the average marks of all the students?	Choose the correct choice:
A) 46 B) 47 C) 48 D) 49 E) 50
Average marks of batch1 = 40   Students in batch1 = 45   Total marks of batch1 = 45 × 40=1800   Average marks of batch2 = 50   Students in batch2 = 50   Total marks of batch2 = 50 × 50=2500   Average marks of batch3 = 55   Students in batch3 = 35   Total marks of batch3 = 35 × 55=1925   Total students = 45+50+35= 
<gadget id="calculator">45+50+35</gadget>
<output>130</output>
130   Average marks of all the students=1800+2500+1925 /130 =47.88   ANSWER:48
<result>C</result>
If the average marks of three batches of 45, 50 and 35 students respectively is 40, 50,55, what is the average marks of all the students?