If the average marks of three batches of 55, 60 and 65 students respectively is 50, 46, 60, then the average marks of all the students is	Choose the correct choice from the following options.
A) 54.48  B) 54.68  C) 52.27  D) 54.58  E) None of these
Explanation:   (55Ã—50)+(60Ã—46)+(65Ã—60) / 55+60+65   9410 / 180=52.27   Option 52.27
<result>C</result>
If the average marks of three batches of 55, 60 and 65 students respectively is 50, 46, 60, then the average marks of all the students is