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Set 10 Q13


 
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arocks
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PostPosted: Sun Oct 07, 2007 5:53 am    Post subject: Set 10 Q13 Reply with quote
If x and y are positive, is 3x > 7y?
(1) x > y + 4
(2) -5x < -14y

I think the answer is B. The OA is D.

Stmt2
-5x<-14y or 5x>14y or 2.5x>7y
So stmt2 is suff.

stmt1 - Not sure how statement1 is useful?
Pls explain. Thanks.
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samirpandeyit62
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PostPosted: Sun Oct 07, 2007 6:41 am    Post subject: Reply with quote
If x and y are positive, is 3x > 7y?

(1) x > y + 4

here if y =2 then x =6 & 3x>7y

y =3 then x =7 so 3x =7y

but if y is greater than 4 then 3x<4y

Hnece this cannot be sufficeint

2) -5x < -14y

i.e 5x > 14y

so we have 2.5x>7y

so suff

Ans should be B
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