Please solve with explanation. I will definitely upvote!
21 Consider a random vector X = with expected value 12 E(X)= = (3) and let C be C= 2 3 1 -1 2 1 Let Σ. = (33) The E(CX) is Select one: O a. 3 X=22 9 ☺ O b. X= 3 1 O c. 15 X= 47 18 O d. 9 X=22
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