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19. If the covariance between two investment returns, call them X1 and X2, is positive,...

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19. If the covariance between two investment returns, call them X1 and X2, is positive, then it means a. they are positively correlated in every sample. b. they are negatively correlated in every sample. c. there must be some sample where they are positively correlated. d. none of the above. 20. Suppose V(X) = 0.0001, then the value of X is close to E(X) with a. high probability. b. low probability. c. probability one, i.e., in every sample. d. none of the above

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