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Suppose X1, X2 are the number of gallons of type A and type B industrial products purchased by a company, respectively. The variances of X]and

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Suppose X1, X2 are the number of gallons of type A and type B industrial products purchased by a company, respectively. The variances of X]and X2 are 2 and 1, respectively and the covariance of X1and X2 is -1. What is Var(2X] - 3X2) ? O 28 O 26 O 29 O 27

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