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X is a discrete random variable representing the profit for a given investment

Economics

  1. X is a discrete random variable representing the profit for a given investment. The probability distribution of X is given as: P(X = x) 0.20 -1 0.30 1 2 0.20 (You must find the missing value to answer this question). What is the variance of X? Select one: O A. 2.2 O B. 1 C. 1.4 D.O E. None of those listed.

  2. 5. If the expected inflation rate was 2.5%, the ex-ante real interest rate was 4.0%, and the actual inflation rate turned out to be 3.2%, then the ex-post real interest rate equals A) 1.7%. B) 3.2%. C) 3.3%. D) 4.7%.

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