138. At a loading dock, each worker on the night crew loaded 3/4 as many boxes as each worker on the day crew. If the night crew has4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?
(A)1/2
(B)2/5
(C)3/5
(D)4/5
(E)5/8
答案E
想請問:
1.黃色部分的意思為何?
2.本題解法
感謝 作者: LeannaChina 时间: 2012-8-3 21:19
the number of boxes loaded by worker( night crew) =3/4 number of
boxes loaded by worker (day crew)
the number of workers in night crew=4/5 number of workers in day
crew
number of boxes loaded per worker(day):b
number of workers(day): w
