When Var (x) = 2.25, Var (y) = 1 and Cov (x, y) = 0.9, then correlation coefficient is

When Var (x) = 2.25, Var (y) = 1 and Cov (x, y) = 0.9, then correlatio

1.	When Var (x) = 2.25, Var (y) = 1 and Cov (x, y) = 0.9, then correlation coefficient is
A.	0.45
B.	0.8
C.	0.6
D.	0.75
Answer» D. 0.75