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During a 10-week summer vacation, was the average [#permalink]
09 Sep 2004, 10:52
0% (00:00) correct
0% (00:00) wrong based on 0 sessions
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.
1. Insufficient. If Carolyn had read 5 books and Jacob had read 6 books i a week, we have 10>12-5 which means Jacob read more than Carolyn. However, if Jacob had read 4 books then again 10>8-5. This time Carolyn has read more. So, we dont know.
2. Insufficient. We dont know about the first 5 weeks. Jacob could have read more.