现有一枚正常的硬币(正负概率均为0.5),先需要多次投掷该硬币,以构造一个概率为0.49的事件.请问如何构造?如掷两次硬币,一正一负的概率为0.5;掷三次,第一次正,后两次负的概率为0.125;…
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![现有一枚正常的硬币(正负概率均为0.5),先需要多次投掷该硬币,以构造一个概率为0.49的事件.请问如何构造?如掷两次硬币,一正一负的概率为0.5;掷三次,第一次正,后两次负的概率为0.125;…](/uploads/image/z/11444146-34-6.jpg?t=%E7%8E%B0%E6%9C%89%E4%B8%80%E6%9E%9A%E6%AD%A3%E5%B8%B8%E7%9A%84%E7%A1%AC%E5%B8%81%EF%BC%88%E6%AD%A3%E8%B4%9F%E6%A6%82%E7%8E%87%E5%9D%87%E4%B8%BA0.5%EF%BC%89%2C%E5%85%88%E9%9C%80%E8%A6%81%E5%A4%9A%E6%AC%A1%E6%8A%95%E6%8E%B7%E8%AF%A5%E7%A1%AC%E5%B8%81%2C%E4%BB%A5%E6%9E%84%E9%80%A0%E4%B8%80%E4%B8%AA%E6%A6%82%E7%8E%87%E4%B8%BA0.49%E7%9A%84%E4%BA%8B%E4%BB%B6.%E8%AF%B7%E9%97%AE%E5%A6%82%E4%BD%95%E6%9E%84%E9%80%A0%3F%E5%A6%82%E6%8E%B7%E4%B8%A4%E6%AC%A1%E7%A1%AC%E5%B8%81%2C%E4%B8%80%E6%AD%A3%E4%B8%80%E8%B4%9F%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA0.5%EF%BC%9B%E6%8E%B7%E4%B8%89%E6%AC%A1%2C%E7%AC%AC%E4%B8%80%E6%AC%A1%E6%AD%A3%2C%E5%90%8E%E4%B8%A4%E6%AC%A1%E8%B4%9F%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA0.125%EF%BC%9B%E2%80%A6)
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