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& U( |5 [* _+ p$ ~
A.503 ? a+ d2 X, _0 S" X* Z% D+ A
B.60
& z8 v0 U. X( N/ w* x5 Q. uTVBNOW 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
( G5 G& F: I [1 X' M1 [) }+ d) Q公仔箱論壇D.75 |
發表於 2007-9-11 07:38 PM
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