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E.有一種遊戲,每次輸贏規則如下:先從 1 至 6 中選定一個號碼 n,再擲三顆公正的骰子。若三顆骰子的點數全都是 n,則可贏 3 元;恰有兩個點數為 n,則可贏 2 元;恰有一個點數為 n,則可贏
問題詳情
E.有一種遊戲,每次輸贏規則如下:先從 1 至 6 中選定一個號碼 n,再擲三顆公正的骰子。若三顆骰子的點數全都是 n,則可贏 3 元;恰有兩個點數為 n,則可贏 2 元;恰有一個點數為 n,則可贏 1 元;而沒有點數為 n,則輸 1 元。如此玩一次的期望值(贏為正,輸為負)為
元。
參考答案
答案:B
難度:非常簡單0.952381
統計:A(15),B(380),C(1),D(3),E(0)
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