Mathematics & Statistics
Undergraduate
請問這題的解法怎麼解呢? 謝謝
6. 設5位助理的薪水分別是 (單位: 千元)25, 27, 30, 32,36, 平均是30, 現在隨機抽
出3人, 則其中2人的薪水大於平均30的機率是:
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