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。0 ]$ I; }, A4 z! }0 ^& `8 d
A.50tvb now,tvbnow,bttvb6 x. ?9 y+ L) {
B.60
' {0 U+ T( o% M8 }, [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。C.65公仔箱論壇 }5 d& _! F }( e7 k9 B6 u9 d
D.75 |
發表於 2007-9-11 07:38 PM
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