[非關] 機率問題....
剛才朋友傳了一張圖給我
裡面有機率問題...(請見下圖 囧)
http://komica5.dreamhosters.com/12/src/1310732118282.jpg
個人算了一下...這題的機率是97.2%
有高手可以幫忙驗算一下嗎? XDD
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