#1 又是數學，求解
[img]http://i250.photobucket.com/albums/gg256/2004198/IESstage1-04.jpg[/img]
a：5124/15625
b：4/9
c：4096/15625
d(1)：5/7
d(2)：2/7
d(3)：8/33
3/7 20:37
Justice
#2
答左你a先
a) 4/5 x 1/5 + 4/5 x 4/5 x 4/5 x 1/5 + 4/5 x 4/5 x 4/5 x 4/5 x 4/5 x 1/5
= 5124/15625
3/7 21:19
kimwong3252000
#3
[quote]原帖由 [i]Justi ..