collect marks of 10 of your classmates in different subjects in the recent examinations. Estimate the arithmetic mean of marks in each subject and verify them by actual calculations. How many of your estimations represent exact mean?
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let the exam be of 100 marks
numbers secured
90
10
80
70
60
50
40
100
60
50
mean_610/10
61
numbers secured
90
10
80
70
60
50
40
100
60
50
mean_610/10
61
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