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

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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:

Options:

A . 53.33

B . 54.68

C . 55

D . None of these

Answer: Option B

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