value of x + y

This topic has expert replies
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

value of x + y

by sanju09 » Wed Sep 15, 2010 1:03 am
What is the value of x + y?

[1] x y = 24.

[2] x/y = 8/3.



[spoiler]Source: https://readyforgmat.com[/spoiler]
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com

User avatar
Master | Next Rank: 500 Posts
Posts: 146
Joined: Fri Jun 25, 2010 3:42 am
Thanked: 3 times
Followed by:1 members
GMAT Score:560

by alivapriyada » Wed Sep 15, 2010 2:29 am
What is the value of x + y?

[1] x y = 24.

[2] x/y = 8/3
.

stmnt 1- xy=24
we cannot determine x+y
Stmnt2 - x/y=8/3
so x=8y/3
or x+y=8y/3+y=11y/3
not sufficient.

combining both statements even wont result in any specific answer
SO IMO E
waiting for the OA and a better expanation!!

User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

by sanju09 » Wed Sep 15, 2010 2:56 am
alivapriyada wrote:
What is the value of x + y?

[1] x y = 24.

[2] x/y = 8/3
.

stmnt 1- xy=24
we cannot determine x+y
Stmnt2 - x/y=8/3
so x=8y/3
or x+y=8y/3+y=11y/3
not sufficient.

combining both statements even wont result in any specific answer
SO IMO E
waiting for the OA and a better expanation!!

This is right that no statement alone is sufficient here. Let's take the two together

Put y = 3 x/8 from [2] in [1], a quadratic in x would be obtained, giving out two results for x; or if you put x = 8 y/3 from [2] in [1], a quadratic in y would be obtained, giving out two results for y. Hence, together [spoiler]too, insufficient

E is right, is your wait over?
[/spoiler]
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com

User avatar
Master | Next Rank: 500 Posts
Posts: 146
Joined: Fri Jun 25, 2010 3:42 am
Thanked: 3 times
Followed by:1 members
GMAT Score:560

by alivapriyada » Wed Sep 15, 2010 3:00 am
sanju09 wrote:
alivapriyada wrote:
What is the value of x + y?

[1] x y = 24.

[2] x/y = 8/3
.

stmnt 1- xy=24
we cannot determine x+y
Stmnt2 - x/y=8/3
so x=8y/3
or x+y=8y/3+y=11y/3
not sufficient.

combining both statements even wont result in any specific answer
SO IMO E
waiting for the OA and a better expanation!!

This is right that no statement alone is sufficient here. Let's take the two together

Put y = 3 x/8 from [2] in [1], a quadratic in x would be obtained, giving out two results for x; or if you put x = 8 y/3 from [2] in [1], a quadratic in y would be obtained, giving out two results for y. Hence, together [spoiler]too, insufficient

E is right, is your wait over?
[/spoiler]
:) :) yes!!!!