If the average marks of three batches of 62, 60 and 45 students respectively is 50, 55, 60, then the
average marks of all the students is  Answers
A) 54.48	B) 54.68	C) 54.6	D) 54.49	E) None of these
Explanation:   (62Ã—50)+(60Ã—55)+(45Ã—60)/(62+60+45)=54.49   Answer: Option 54.49
<result>D</result>
If the average marks of three batches of 62, 60 and 45 students respectively is 50, 55, 60, then the
average marks of all the students is