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At first I thought those were negatives. But I don't think they are meant to be neg's, so I came up with E as the answer. Neither are sufficient. 2 tells you that Z is positive. You still can't determine if Z is < 4.

Stmt 1: negative Z < 9, which when you divide both sides by negative 1 you get: Stmt 1: Z > -9 Stmt 2: negative T < negative 4, which when you divide both sides by negative 1 you get: Stmt 2: T > 4

We know Z*T is < -3 which tells us Z < -3T

Stmt 1: Z > -9 Insuff. Z could be larger or smaller than 4 depending on T

Stmt 2: T > 4 Suff. If T is any number greater than 4 then Z will always be less than 4.

gmatclubot

Re: DS - Inequality
[#permalink]
29 Feb 2008, 13:02