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Archived Topic
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04 Aug 2006, 13:56
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Is it C?
If line y = 3x+2 contains the point (r,s) then
s= 3r+2 must be true i.e 3r+2-s = 0 must be true.
St1: Either 3r+2-s = 0 or 4r+9-s =0 : INSUFF
St2: Either 3r+2-s = 0 or 4r-6-s =0 : INSUFF
Combined:
Either
3r+2-s = 0 is true
OR
Both 4r+9-s = 0 and 4r-6-s =0 are true. This is impossible because 4r-s can not be equal to -9 or 6 at the same time.
So 3r+2-s = 0 is true. Hence (r,s) lies on line y = 3x+2
If line y = 3x+2 contains the point (r,s) then
s= 3r+2 must be true i.e 3r+2-s = 0 must be true.
St1: Either 3r+2-s = 0 or 4r+9-s =0 : INSUFF
St2: Either 3r+2-s = 0 or 4r-6-s =0 : INSUFF
Combined:
Either
3r+2-s = 0 is true
OR
Both 4r+9-s = 0 and 4r-6-s =0 are true. This is impossible because 4r-s can not be equal to -9 or 6 at the same time.
So 3r+2-s = 0 is true. Hence (r,s) lies on line y = 3x+2
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
