Section: B Q # 2. Find Quartile deviation, Mean deviation and Coefficient of Quartile deviation from the following data? Class Boundaries (marks) No.of students 19.5--29.5 29.5--39.5 39.5-49.5 49.5-59.5 59.5-69.5 69.5--79.5 79.5--89.5 8 87 190 304 211 85 20

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