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In the given table frequency distribution of marks in mathematics of 100 students are given. Express the values of frequency as percentage of total frequency [Relative frequency] Which class has the maximum and minimum concentration of data?

Marks Frequency
0- 10 1
10-20 8
20-30 6
30-40 7
40-50 21
50-60 23
60-70 19
70-80 6
80-90 5
90 – 100 4
Total 100

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Marks Frequency
0- 10 1
10-20 8
20-30 6
30-40 7
40-50 21
50-60 23
60-70 19
70-80 6
80-90 5
90 – 100 4
Total 100

1. maximum concentration of data is in class (50-60)
2. minimum concentration of data is in class (0-10)

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