[問題] 丟骰子問題
大家好 想請問有關丟骰子的問題
兩人輪流丟兩顆骰子 甲如果丟到和為6就贏 乙如果先丟到和為7就贏
甲先開始丟,直到出現贏家為止
請求丟骰子的期望次數
甲贏的機率為5/36 乙為6/36
期望次數為 1x5/36+2x(25/36)x(6/36)+3x(25/36)^2x(5/36)+....
不知該怎麼算出上式
請各位高手指導 感激不盡 ^ ^
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