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。: ~2 D: M# x" U. O @+ F" t
A.50
# J: D* d0 V- bB.605.39.217.762 @ s5 G# O! {: c! e. {; Z5 O; l& X
C.65
) g. {( h7 j8 jD.75 |
發表於 2007-9-11 07:38 PM
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