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?6 \6 X& s. a3 k [, ^
A.50tvb now,tvbnow,bttvb$ H1 K( h. K$ Y% X9 d: p
B.60* J% F5 a+ O& L- x5 A& f
C.65
9 j8 ]$ m5 Z9 m3 U9 i- k9 h7 vTVBNOW 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。D.75 |
發表於 2007-9-11 07:38 PM
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