2. 外语
  3. A group of 7 fishermen chartered a boat for a day to fish for flounder. The boat costs x dollars per day to rent. If the group c

A group of 7 fishermen chartered a boat for a day to fish for flounder. The boat costs x dollars per day to rent. If the group c

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问题 A group of 7 fishermen chartered a boat for a day to fish for flounder. The boat costs x dollars per day to rent. If the group can find 3 more fishermen on the docks who are willing to come aboard and share the rental costs, how much less will the rental cost be per person in terms of x?
选项 A、x/70
B、x/35
C、3x/70
D、3x/10
E、3x/7
答案C
解析 The difference in cost is the difference between x/7 and x/10. x/7-x/10=(10x-7x)/70 =3x/70.
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