Re: [新聞] 一擲3個聖筊！柯媽曝神明指示 急電柯文已回收
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安安我板橋周守訓
簡單來算一下，當筊杯單面機率不是1/2時，聖筊機率會大於還是小於1/2
首先假設擲單個筊杯，正面機率是x，反面機率就是1-x
擲兩個筊杯，一正一反機率就是 1-x^2-(1-x)^2 = 2x(1-x)
根據算幾不等式
√(x(1-x)) <= (x+(1-x))/2 = 1/2
所以 x(1-x) <= 1/4
所以 2x(1-x) <= 1/2
等式只成立在 x 等於 (1-x) 時
得證當筊杯單面機率不是1/2時，聖筊機率會小於1/2
大guy 4 john
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