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At a certain theater, the cost of each adults ticket is $5

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Senior Manager
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At a certain theater, the cost of each adults ticket is $5 [#permalink] New post 08 Sep 2007, 12:45
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At a certain theater, the cost of each adults ticket is $5 and the cost of each childs ticket is $2. What is the average cost of all the adults and chilren's tickets sold at the theater yesterday?


1) yesterday the ratio of the number of childrens tickets sold at the theater to the number of adults tickets sold was 3 to 2

2) yesterday 80 adults tickets were sold at the theater













OA is A, but why?
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Re: GMATPrep: DS [#permalink] New post 08 Sep 2007, 13:37
zakk wrote:
At a certain theater, the cost of each adults ticket is $5 and the cost of each childs ticket is $2. What is the average cost of all the adults and chilren's tickets sold at the theater yesterday?


1) yesterday the ratio of the number of childrens tickets sold at the theater to the number of adults tickets sold was 3 to 2

2) yesterday 80 adults tickets were sold at the theater

OA is A, but why?


Because they ask us "the average cost", so we don't need definite numbers, ratio is enough.
Re: GMATPrep: DS   [#permalink] 08 Sep 2007, 13:37
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At a certain theater, the cost of each adults ticket is $5

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