If p1,p3;p2,p4 had been connecded,you would be right
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You are correct.
-ManYou-
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06/30/2010 postreply
17:13:45
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It got to same anwser: (1/2+1/4+1/8)*(1/2+1/4)*4/6=7/16
-ManYou-
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06/30/2010 postreply
18:41:37