If the average marks of three batches of 55, 60 and 45 students is 50, – McqOptions

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1.	If the average marks of three batches of 55, 60 and 45 students is 50, 55 and 60 respectively, then the average marks of all the students is
A.	58
B.	56.69
C.	54.68
D.	60
Answer» D. 60

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