X, Y and Z are three uncorrelated variables having variances \(\sigma – McqOptions

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1.	X, Y and Z are three uncorrelated variables having variances \(\sigma_x^2, \sigma_y^2 \:and\:\sigma_z^2\) respectively, then the correlation between X + Y and Y + Z is:
A.	1 / 2
B.	1
C.	none of these
D.	0
Answer» D. 0

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