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Juan bought some paperback books that cost $8 each and some

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Juan bought some paperback books that cost $8 each and some [#permalink] New post 08 Oct 2007, 17:02
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Juan bought some paperback books that cost $8 each and some hardcover books that cost $25 each. If Juan bought more than 10 paperback books, how many hardcover books did he buy?

St1-the total cost of the hardcover books that Juan bought was at least $150.
St2-the total cost of all the books that Juan bought was less than $250.



A certain list consists of 5 different integers. Is the average of the two greatest integers in the list greater than 70?

St1-the median of the integers in the list is 70.
St2-the average of the integers in the list is 70.



On his trip from Alba to Benton, Julio drove the first x miles at an average rate of 50mph and the remaining distance at an average rate of 60mph. How long did it take Julio to drive the first x miles?

St1-on his trip, Julio drove for a total of 10 hours and drove a total of 530 miles.
St2-on his trip, it took Julio 4 hrs more to drive the first x miles than to drive the remaining distance.
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 [#permalink] New post 09 Oct 2007, 10:59
for the first question, it seems to me that there are two possibilities:
paperbooks: 11
hardcover: 6
total cost: 238

or

paperbooks: 12
hardcover: 6
total cost: 246

can someone clarify?
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 [#permalink] New post 09 Oct 2007, 11:31
young_gun wrote:
for the first question, it seems to me that there are two possibilities:
paperbooks: 11
hardcover: 6
total cost: 238

or

paperbooks: 12
hardcover: 6
total cost: 246

can someone clarify?


The question is asking for the number of hardcover books bought. Combining the 2 statements, the number of hardcover books cannot be more than 6 even though the number of paperback books bought can vary (hence, your 2 possibilities).
  [#permalink] 09 Oct 2007, 11:31
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Juan bought some paperback books that cost $8 each and some

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