問題詳情
21. 已知甲袋有 5 張分別標示 1 ~ 5 的號碼牌，乙袋有 6 張分別標示 6 ~ 11 的號碼牌，慧婷分別從甲、乙兩袋中各抽出一張號碼牌。若同一袋中每張號碼牌被抽出的機會相等，則她抽出兩張號碼牌，其數字乘積為 3 的倍數的機率為何？
(A) 1/10
(B) 1/3
(C) 7/15
(D) 8/15
參考答案
無參考答案
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