Question

The following table gives the distribution of marks of 100 students in examination.marks as 0-10 10-20 20-30 30-40 40-50 50-60 60-70 and frequency as 5,10,18,26,22,15,4 respectively calculate quartile deviation. of song... Por calculate co efficient ? calculate mean deviation about men and median.
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Answer 1

this is the correct answer for this question and at beside you can see the graph