m+z>0

logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pm; Thanked: 237 times; Followed by:25 members; GMAT Score:730

Re: m+z>0

by logitech » Mon Nov 24, 2008 11:53 pm

Feruza Matyakubova wrote:is m+z>0

(1) m-3z>0
(2) 4z-m>0

i think the OA is E,
but im very confused....

Another Gmat Prep question, which I saw in my test today

1) m>3z insuf
2) 4z>m insuf

1+2)

m-3z>0
4z-m>0
+
------------

z>0 ; since m>3z --> m>0

so m+z >0

Hence, C

LGTCH
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