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The marks obtained by 40 students of a class in an examination are given below8, 47, 22, 31, 17, 13, 38, 26, 3, 34, 29. 11, 22. 7, 15. 24, 38, 31.21.35. 42. 24, 45, 23,21, 27. 29, 49, 25, 48, 21, 15, 18, 27, 19, 45, 14, 34, 37.34.

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