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. 53.33 b. 54.68 c. 55 d. none of these
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I think it's 55 by using their mean .
Let me know if I am wrong.
Let me know if I am wrong.
khaibari:
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