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Among the 9,000 people attending a football game at College [#permalink]
12 Dec 2015, 08:00
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Expert's post
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Question Stats:
71% (00:39) correct
28% (00:47) wrong based on 313 sessions
Among the 9,000 people attending a football game at College C, there were x students from College C and y students who were not from College C
Quantity A
Quantity B
The number of people attending the game who were not students
9,000 − x − y
A)The quantity in Column A is greater. B)The quantity in Column B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.
Practice Questions Question: 5 Page: 151 Difficulty: medium
Re: Among the 9,000 people attending a football game at College [#permalink]
09 Jun 2018, 05:36
2
This post received KUDOS
Expert's post
Carcass wrote:
Among the 9,000 people attending a football game atCollege C, there were x students from College C and y students who were not from College C
Quantity A
Quantity B
The number of people attending the game who were not students
9,000 − x − y
A)The quantity in Column A is greater. B)The quantity in Column B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.
Practice Questions Question: 5 Page: 151 Difficulty: medium
Another approach is to use the Double Matrix Method. This technique can be used for most questions featuring a population in which each member has two characteristics associated with it (aka overlapping sets questions). Here, we have a population of people watching a football game, and the two characteristics are: - from College C or not from College C - student or non student
We can set up out diagram as follows:
Since the two columns (student and non-student) must add to 9000, the SUM of the two boxes in the non-student column must = 9000 - (x + y) = 9000 - x - y
So, we get: Quantity A: 9000 - x - y Quantity B: 9000 - x - y
Answer: C
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Re: Among the 9,000 people attending a football game at College [#permalink]
09 Jul 2018, 18:33
Carcass wrote:
Among the 9,000 people attending a football game atCollege C, there were x students from College C and y students who were not from College C
Quantity A
Quantity B
The number of people attending the game who were not students
9,000 − x − y
A)The quantity in Column A is greater. B)The quantity in Column B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.
Practice Questions Question: 5 Page: 151 Difficulty: medium
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71% (00:39) correct
