7. Find the mean marks for the following data.

Marks Below 10 Below 20 Below 30 Below 40 Below 50 Below 60 Below 70 Below 80 Below 90 Below 100

No. of students 5 9 17 29 45 60 70 78 83 85

fi=85fixi=4115Mean =fixifi=411585=43.3   ANS...

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