看不懂题目，又greater 又less

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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.

A

看不懂（1），又greater 又less的？？？？

望大牛指教！！！！

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.加个逗号楼主再理解下