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答案：C
解析：
If (3x) - 2 less than 10 and x + 2 greater than -8, then -10 less than x less than 4. The numbers from the listed set that satisfy these inequalities are -5 and 0. There are five elements in the listed set, so the probability of a number chosen at random from the set being a member of the solution set of both inequalities is 2/5.
