It should be: (1/2+1/4+1/8)*(1/2+1/4)=21/32
所有跟帖:
• If p1,p3;p2,p4 had been connecded,you would be right -jinjing- ♀ (0 bytes) () 06/19/2010 postreply 19:51:10
• You are correct. -ManYou- ♂ (4 bytes) () 06/30/2010 postreply 17:13:45
• It got to same anwser: (1/2+1/4+1/8)*(1/2+1/4)*4/6=7/16 -ManYou- ♂ (0 bytes) () 06/30/2010 postreply 18:41:37