If the average marks of three batches of 55, 60 and 45 studentsrespectively is 50, 55, 60, then the average marks of all the students is:

If the average marks of three batches of 55, 60 and 45 students

1.	If the average marks of three batches of 55, 60 and 45 studentsrespectively is 50, 55, 60, then the average marks of all the students is:
A.	53.33
B.	54.68
C.	55
D.	None of these
Answer» E.

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&nbsp; If the average marks of three batches of 55, 60&nbsp;and 45 studentsrespectively is 50, 55, 60, then the average marks of&nbsp;all the students is:

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If the average marks of three batches of 55, 60 and 45 studentsrespectively is 50, 55, 60, then the average marks of all the students is: