P(这次正/前亿次正)= P (前亿次正/这次正)×P (这次正)/(P (前亿次正/这次正)x P (这次正)+ P (前亿次正/这次负)x P (这次负))
Fair coin 前提:
=1 x 0.5 / (1x0.5 + 1 x 0.5)=0.5
非fair coin前提:
= 1 x 1 / (1 x 1 + 1 x 0)= 1
当然如果不是全非fair也不是全fair,答案则在 0.5 和1之间
P(这次正/前亿次正)= P (前亿次正/这次正)×P (这次正)/(P (前亿次正/这次正)x P (这次正)+ P (前亿次正/这次负)x P (这次负))
Fair coin 前提:
=1 x 0.5 / (1x0.5 + 1 x 0.5)=0.5
非fair coin前提:
= 1 x 1 / (1 x 1 + 1 x 0)= 1
当然如果不是全非fair也不是全fair,答案则在 0.5 和1之间
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