there r 2 groups of worker.. skilled n partially skilled. if both group work togather they nid 30 days to finish the job. if partially skilled worker can oni do 2/3 of the skilled worker did in a day. how many days needed if only partially skilled worker is workin to finish the job?TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。: z$ ^0 C r: O3 C4 ~/ o
A.505.39.217.76% t0 E8 `" ?- [2 o: W( v- C n
B.60TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。% a9 J6 _: ~+ j
C.655.39.217.76$ ~" w/ j/ N+ ~* O- L
D.75 |
發表於 2007-9-11 07:38 PM
| 
