Mathematics, 09.02.2021 01:10, maddo36

We choose a number from the set {10, 11, . . . , 99} uniformly at random. Let X be the first digit of the chosen number and Z the sum of the two digits (e. g., the first digit of 12 is 1). Compute the probability mass function of X and Z, respectively. Are X and Z independent

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We choose a number from the set {10, 11, . . . , 99} uniformly at random. Let X be the first digit o...