If the average marks of three batches of 55, 60 and 45 students respe – 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.	54
B.	54.68
C.	54.86
D.	56.68
Answer» C. 54.86

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