GWD数学题求教

melody远行

During a 10-week summer vacation, was the average (arithmetic mean) number of books that Carolyn read per week greater than the average number of books that Jacob read per week?

(1)Twice the average number of books that Carolyn read per week was greater than 5 less than twice the average number of books that Jacob read per week.

(2)During the last 5 weeks of the vacation, Carolyn read a total of 3 books more than Jacob.
这题给的正确答案是A，可是我觉着第一个条件解不出来。假设C是Carolyn阅读的数目，J是Jacob阅读的数目。根据（1）：2C>2J-5，那么C-J>-2/5,可是还是不知道C究竟是不是大于J。我觉得应该选E。有同学能指点指点吗

melody远行

有会的同学能教教吗？