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14 Oct 2020, 00:15
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
57% (02:04) correct
43%
(01:47)
wrong
based on 215
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Is \(x + 2y - 3z > 0\) ?
(1) \(4x - 3y - z > 0\)
(2) \(3x + 2z - 5y > 0\)
(1) \(4x - 3y - z > 0\)
(2) \(3x + 2z - 5y > 0\)
08 Feb 2021, 07:37
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rudywip
chetan2u but if we subtract 1 and 2, will the result not be the inequality mentioned in the stem? If not, kindly explain why.
Cheers
Rudolf
Cheers
Rudolf
Hi
Even if you have to subtract, you never subtract the same side, because we don’t know how much equation is greater than other side.
For example
7>6
5>1
7-5>6-1......NO
But 7+5>6+1
Another example
3>0 and 5>0
3-5>0-0....-2>0......NO
14 Oct 2020, 01:04
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Bunuel
Is \(x + 2y - 3z > 0\) ?
(1) \(4x - 3y - z > 0\)
(2) \(3x + 2z - 5y > 0\)
(1) \(4x - 3y - z > 0\)
(2) \(3x + 2z - 5y > 0\)
THREE variables and that too an INEQUALITY.
The answer should be E in most cases unless one of the statements can be converted to the question inequality or both statements can add up to the question inequality.
(1) \(4x - 3y - z > 0\)
(2) \(3x + 2z - 5y > 0\)
None of the can be modified to read \(x + 2y - 3z > 0\).
Also when we add up the two statements, we get 7x-8y+z>0. Also we can find relations, in terms of inequality, between any two variables.
But we cannot answer the given question.
E
