For 50 students of a class, regression equation of marks in statistics (x) on marks in Accountancy (y) in `3y-5x+180=0`. The mean in Accoutancy is 44 and the variance of marks in statics is 9/16 of the varience of marks in Accountancy. Find the mean marks in Statistics and coefficient of correlation between marks in two subjects.

The line of regression marks in economics (X) for marks in mathematics (Y) for a class of 50 students is 3y - 5x+180 = 0. Average score in mathematics is 44 and variance of marks in economics is 9/16th , of variance of marks in mathematics. Find the average score in economics and also the coefficient of correlation between marks in economics and mathematics.

The two lines of of regressions are x+2y-5=0 and 2x+3y-8=0 and the variance of x is 12. Find the variance of y and the coefficient of correlation.

The two lines of regression are x+ 2y- 5= 0 and 2x + 3y - 8=0 and the variance of x is 12. Find the variance of y and the coefficient of correlation.

Regression equation of y on x and y be x + 2y - 5 = 0 and 2x + 3y - 8 = 0 respectively and the variance of x is 12. find the variance of y.

The table shows the marks obtained by 25 students in a class test. Find the mean of the marks obtained

Sunny scored x marks in Maths, y marks in Science and 50 marks in English. What is his total score in these three subjects?

Savio scores x marks in Mathematics, y marks in Physics, and z marks in Chemistry. Calculate his total score in all three subjects.

Raza scored 30 marks in Maths, x marks in Science and y marks in English. What is his total score in these three subjects ?

The marks of 8 students in an examination in Statistics and Mathematics are given below Find Spearman's rank Correlation coefficient.