It got to same anwser: (1/2+1/4+1/8)(1/2+1/4)4/6=7/16

來源: ManYou 於 2010-06-30 18:41:37 [舊帖] [給我悄悄話] 本文已被閱讀：次

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It got to same anwser: (1/2+1/4+1/8)*(1/2+1/4)*4/6=7/16