X and Y are two random variables and Z = X + Y . Letmz, mz, mx, my represent mean of Z, X and Y. Then

X and Y are two random variables and Z = X + Y . Letmz, mz, mx, my rep

1.	X and Y are two random variables and Z = X + Y . Letmz, mz, mx, my represent mean of Z, X and Y. Then
A.	mz = mx + my
B.	mz ‚â§ mx + my
C.	mz< mx + my
D.	mz > mx + my
Answer» B. mz ‚â§ mx + my