For 60 students of a class, the regression equation of marks in statistics (X) on the
marks in accountancy (Y) is 3Y – 5X + 180 = 0. The mean marks in accountancy is
50 and the variance of marks in statistics is (9/16)th of the variance of marks in
accountancy. Find mean marks in statistics and the coefficient of correlation between
marks in the two subjects.
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