Tẹn students got the following percentage of marks in Principles of Economics and Statistics. : 1 9 10 2 3 Marks in Economics : 78 36 98 25 75 82 90 62 65 39 Marks in Statistics : 84 51 91 60 68 62 86 58 53 47 Roll Nos. 4 5 7 8 Calculate the co-efficient of correlation.

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