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3. Suppose X is a random variable with survival function s (3 ) = exp (-22 for x 20. (a) Compute Var (X). (b) Compute

3. Suppose X is a random variable with survival function s (3 ) = exp (-22 for x 20. (a) Compute Var (X). (b) Compute E (min (X, c)) for all c 2 0. (c) Compute Cov (min (X, X' ) , max (X, X? ) )

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