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The average marks in History scored by the students of a class in the exam was 48. If 4 of these students who actually scored

The average marks in History scored by the students of a class in the exam was 48. If 4 of these students who actually scored 5, 7, 9 and 11 are not counted, the average marks for the class in the exam would have been 50. Find the number of student in class.

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