6. The marks obtained by 50 students are given below: 31 30 45 38 42 30 31 13 46 41 44 18 29 63 30 30 46 36 44 15 7. 25 12 30 44 30 19 22 24 37 15 6. 39 32 21 20 6. 42 31 19 14 23 28 17 53 22 21 Construct a group frequency distribution.

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