If the average marks of three batches of 40, 50 and 60 students respec – McqOptions

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1.	If the average marks of three batches of 40, 50 and 60 students respectively is 30, 50 and 70, then the average marks of all the students is:
A.	63.33
B.	52.66
C.	60
D.	65
E.	None of these
Answer» C. 60

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