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?公仔箱論壇 ^/ ^5 v4 K& m$ ?. |, {
A.50
. O1 H" F, @/ }$ s/ C+ t( ^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。B.60tvb now,tvbnow,bttvb4 }" b+ g6 t% s0 _
C.65tvb now,tvbnow,bttvb. U1 f" \/ D- r6 `0 u: f
D.75 |
發表於 2007-9-11 07:38 PM
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