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Re: Are x and y both positive? [#permalink]
03 Oct 2006, 19:17
1
This post was BOOKMARKED
Are x and y both positive?
1) 2x-2y = 1
2) x/y >1
Statement 1 can have two possibilities. x=-1.5 and y= -1 OR x=1 and y=1.5. When plugged into Statement 1 they both yield 1. So x and y could be both positive or negative. Not sufficient.
2) x & y can be both either positive or negative. -4/-2=2 >1 and 3/1 =3 >1. Not sufficient
Together these are not sufficient either.....so my answer is E
Re: Are x and y both positive? [#permalink]
03 Oct 2006, 19:26
Raghavender wrote:
Are x and y both positive? 1) 2x-2y = 1 2) x/y >1
Good Question !!
Answer B
Stmt 1 x-y= 1/2 Insuff
Stmt 2 x/y > 1
From this stmt we know x > y and since x > y , x and y could only be both +ve .
It cannot be both -ve because x/y > 1 would not hold true.
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