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

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1.	If the average marks of three batches of 55, 60 and 45 students respectively 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» C. 55

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