如果同时投n个6面骰,然后每次只把非6的骰子重投,那么当所有骰子为6时的期望投掷次数是多�? 知乎 Template




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tomski如果同时投n个6面骰,然后每次只把非6的骰子重投,那么当所有骰子为6时的期望投掷次数是多�? 知乎 coloring