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PFA is m+z >0 1: m -3z >0 2: 4z -m >0

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Manager
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PFA is m+z >0 1: m -3z >0 2: 4z -m >0 [#permalink] New post 05 Oct 2008, 02:39
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

PFA

is m+z >0

1: m -3z >0
2: 4z -m >0
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SVP
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Re: vs: is m+z >0 [#permalink] New post 05 Oct 2008, 07:06
is m+z >0

1: m -3z >0
2: 4z -m >0

is m> -z

from 1

m>3z......insuff

from 2

4z>m = -4z<-m

add 1 and 2

z>0

however from 1 m>3z thus sure m>-z.........suff

C is my answer
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Re: vs: is m+z >0 [#permalink] New post 05 Oct 2008, 09:54
solving for statements (1) or (2) won't do becuase you get either m > 3z or m < 4z

when you need ---> m < -z

but together (1) & (2)

m -3z > 0 & 4z -m > 0 ---> z > 0 and m > 0

sufficient

the answer is (C)

:)
Re: vs: is m+z >0   [#permalink] 05 Oct 2008, 09:54
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PFA is m+z >0 1: m -3z >0 2: 4z -m >0

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