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WHERE DID -2 x 4x5 COME FROM? WHAT FORMULA IS BEING USED? PLEASE EXPLAIN X and Y are random variables such that: X=10,X2=2Y=10,Y2=3COV[X,Y]=6 Let W=4X5Y

image text in transcribed WHERE DID -2 x 4x5 COME FROM? WHAT FORMULA IS BEING USED? PLEASE EXPLAIN

X and Y are random variables such that: X=10,X2=2Y=10,Y2=3COV[X,Y]=6 Let W=4X5Y What is the value of W2 ? (A) 133 (B) 7 (C) 23 (D) 347 (E) None of the above Question 3 W2=Var(W)=Var(4X5Y)=16Var(X)+25Var(Y)245COV(X,Y)=162+2532456=32+75240=133

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