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?7 |# Q Z4 y2 h
A.50tvb now,tvbnow,bttvb& R6 [. y( T, K
B.60
8 Q" C8 J; T7 g. qC.65
9 X) m1 |2 u$ N! W* t! u S0 \9 GTVBNOW 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。D.75 |
發表於 2007-9-11 07:38 PM
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