the average mark of 70 students in a class is 80. out of these 70 students, if

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the average mark of 70 students in a class is 80. out of these 70 students, if the average mark of 40 students is 75, what is the average mark of the remaining 30 students?

Options:

A . 44.45

B . 58.34

C . 86.67

D . 71.23

Answer: Option C
Explanation :

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