Determine which of the following statements is true or untrue and explain the reason why. I. If G and H are not mutually exclusive events, then P(G∪H) = P(G) + P(H). II. A statistic characterizes a probsbility distribution. III. N and O are independent variables with variances of 4 and 6, respectively. Therefore, Var(2N - O + 2) = 3.

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