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Var(aX + BY)=
A) a2σX2+b2σY2a ^ { 2 } \sigma \stackrel { 2 } { X } + b ^ { 2 } \sigma \stackrel { 2 } { Y }

Question 16

Multiple Choice

var(aX + bY) =


A) a2σX2+b2σY2a ^ { 2 } \sigma \stackrel { 2 } { X } + b ^ { 2 } \sigma \stackrel { 2 } { Y }
B) a2σX2+2abσXY+b2σY2.a^{2} \sigma_{\mathrm{X}}^{2}+2 a b \sigma_{X Y}+b^{2} \sigma_{Y}^{2} .
C) σXY+μXμY\sigma _ { X Y } + \mu _ { X } { } ^ { \mu } Y ^ { * }
D) aσX2+bσY2a \sigma _ { \mathrm { X } } ^ { 2 } + b \sigma _ { \mathrm { Y } } ^ { 2 }

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