Find the mean marks of students from the...

Find the mean marks of students from the following cumulative frequency distribution: marks No. of Students Marks No. of Students 0 and above, 10 and above, 20 and above, 30 and above, 40 and above, 50 and above, 60 and above, 70 and above, 80 and above, 90 and above, 100 and above, 80, 77, 72, 65, 55, 43, 28, 16, 10, 8, 0

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Find the mean marks of the students from the following cumulative frequency distribution: Marks: Below Below Below Below Below Below Below Below Below Below 10 20 30 40 50 60 70 80 90 100 No. of Students 5 9 17 29 45 60 70 78 83 85

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