The following table gives the marks obtained by a set of students in a certain examination. Calculate the average mark per student. Marks Number of students Marks Number of students 10-30 20-30 30-40 1 60-70 12 2 70-80 16 3 80-90 5 90-100 10 40-50 4 50-60 7

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The following table gives the marks obtained by a set of students in a certain examination. Calculate the
average mark per student.
Marks
Number of students
Marks
Number of students
10-30
1 60-70
12
20-30
2 70-80
16
30-40
3 80-90
10
40-50
5 90-100
4
50-60
Transcribed Image Text:The following table gives the marks obtained by a set of students in a certain examination. Calculate the average mark per student. Marks Number of students Marks Number of students 10-30 1 60-70 12 20-30 2 70-80 16 30-40 3 80-90 10 40-50 5 90-100 4 50-60
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