og上一道题

littlestoner

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 has 4\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 C3\5 D4\5 E5\8 

 没看懂答案解释 那个TWO CREWS 很难理解~

angelavivi

answer:E

day crew load / (day crew load + night crew load)=5/8

two crew load=day crew load + night crew load

tuxiaoyangs

night crew是夜班工作的人，Day crew是日班工作的人，TWO CREWS就是日夜两班的人.

littlestoner

THX~~~~~~~ 我还以为是两个人呢~ 哈