the average mark of the students of a class in a particular exam is 80. if 5 s

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the average mark of the students of a class in a particular exam is 80. if 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. find the number

Options:

A . 20

B . 15

C . 25

D . 35

Answer: Option C
Explanation :

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