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。3 d" ]1 _% {) o8 W; r' b
A.507 b2 g {2 D4 z
B.60
7 i1 B g+ Q* T& M; _: A; uC.655 t% {8 e$ m* o; ^) I& I
D.75 |
發表於 2007-9-11 07:38 PM
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