Find the mean deviation about median for the following data 3 marks Marks 0 10 10 20 ...........

Find the mean deviation about median for the following data: (3 marks)

Marks 0 -10 10 -20 20 – 30 30 – 40 40 – 50 50 – 60 Number of girls 6 8 14 16 4 2

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