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3.箱中有三顆紅球與三顆白球。一摸彩遊戲是從箱中隨機同時抽出兩顆球。如果抽出的兩球顏色不同,則得獎金 100元;如果兩球顏色相同,則無獎金。請問此遊戲獎金的期望值為何?(A) 20元 (B) 30元
問題詳情
3.箱中有三顆紅球與三顆白球。一摸彩遊戲是從箱中隨機同時抽出兩顆球。如果抽出的兩球顏色不同,則得獎金 100元;如果兩球顏色相同,則無獎金。請問此遊戲獎金的期望值為何?
(A) 20元
(B) 30元
(C) 40元
(D) 50元
(E) 60元
參考答案
上一篇 :
4. 如圖 1,已知 ,求 的值為下列何者? (A) 10 (B) (C) (D) 16
下一篇 :
5. Which of the following structure—function pairs is mismatched?(A) nucleolus—ribosome production (
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