Choose the best answer. Please show the computation and explain the answer.  Which of the following statements is true? I) A and B are independent variables with means of 6 and 8, respectively. Therefore, E(3A - B + 3) = 13. II) A and B are independent variables with variances of 6 and 8, respectively. Therefore, Var(3A - B + 3) = 13. a. I only b. II only c. Both are correct d. Both are false

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 87E
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Choose the best answer. Please show the computation and explain the answer. 

Which of the following statements is true?

I) A and B are independent variables with means of 6 and 8, respectively. Therefore, E(3A - B + 3) = 13.

II) A and B are independent variables with variances of 6 and 8, respectively. Therefore, Var(3A - B + 3) = 13.

a. I only

b. II only

c. Both are correct

d. Both are false

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