問題詳情
3. 袋中有9個球,分別印有1,2,3,…,9等號碼,今自袋中同時任取三個球,求此三球中號碼最大者是7的機率為 ___________。
參考答案
答案:B
難度:適中0.477838
統計:A(136),B(442),C(171),D(42),E(0) #
個人:尚未作答書單:台灣地區啟智教育
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