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During a 10-week summer vacation, was the average [#permalink]
23 Apr 2008, 08:02

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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.

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.

First of all, this is a question testing averages, so it's at most a medium level question.

Let C = Caro's avg Let J = Jacob's avg

a) 2C > 2J-5 b) Last 5 weeks is not enough information.

simple enough, and since it's an "at-most" medium level question, nothing tricky involved

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.

First of all, this is a question testing averages, so it's at most a medium level question.

Let C = Caro's avg Let J = Jacob's avg

a) 2C > 2J-5 b) Last 5 weeks is not enough information.

simple enough, and since it's an "at-most" medium level question, nothing tricky involved

I like A

Can you please refer to rpmodi's explanation above. Thanks

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.

First of all, this is a question testing averages, so it's at most a medium level question.

Let C = Caro's avg Let J = Jacob's avg

a) 2C > 2J-5 b) Last 5 weeks is not enough information.

simple enough, and since it's an "at-most" medium level question, nothing tricky involved

I like A

Can you please refer to rpmodi's explanation above. Thanks

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