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The data for marks in Physics and History obtained by ten students are given below :

Marks in Physics 15 12 8 8 7 7 7 6 5 3 Marks in History 10 25 17 11 13 17 20 13 9 15 Using this data: (i) Find the line of regression in which physics is taken as the independent variable. (ii) A candidate had scored 10 marks in Physics but was absent from the History test.Estimate his probable score for the latter test.
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