X and Y are two random variable and Z = X + Y. Let œÉx2, œÉy2 and œÉz2 be variance of X, Y and Z. Then

X and Y are two random variable and Z = X + Y. Let œÉx2, œÉy2 and

1.	X and Y are two random variable and Z = X + Y. Let œÉx2, œÉy2 and œÉz2 be variance of X, Y and Z. Then
A.	œÉz2 = œÉx2 + œÉy2
B.	œÉz2 ‚â§ œÉx2 + œÉy2
C.	œÉz2 < œÉx2 + œÉy2
D.	œÉz2 > œÉx2 + œÉy2
Answer» B. œÉz2 ‚â§ œÉx2 + œÉy2