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

Question

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

Required average = 55 x 50 + 60 x 55 + 45 x 60 55 + 60 + 45 = 2750 + 3300 + 2700 160 = 8750 160 = 54.68

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