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chetanojha
- Master | Next Rank: 500 Posts
- Posts: 125
- Joined: Sun Sep 16, 2007 1:38 pm
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take 1st statement : with this we cannot get any info regari\ding whether z < 9 or not. hence insuf.
take 2nd: if you put t = -5 then u'll get z> 3/5 so its a range. not suff.
for any value of t < -4 u'll get a range of Z that is greater than 3/5. hence insuff.
here i can also take a case of t as -4.5 as it is not mentioned that both are intergers. but we don't need that. hence insuf
take both the statements together u'll get that t < -4 and z < 9 so here put t = -5 , u'll get z > 3/5 and we know that z < 9. but even these 2 conditions are not sufficient to prove that z< 4. u can take any value of t < -4 and check. u'll not be able to get a firm answer. hence insuff.
hence E is the answer.
