BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Value of y?

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 52
Joined: Mon Jun 07, 2010 8:36 pm
Location: India
Thanked: 3 times
Followed by:1 members
GMAT Score:720

Value of y?

by monusangeeta » Thu Sep 30, 2010 7:41 am
Dear Experts,

Please help me with this question...

What is the value of y?

(1) 3|x^2 - 4| = y - 2

(2) |3 - y| = 11

My approach:

Statement 1: Insuff as there are 2 variables
Statement 2: Insuff

3-y = 11, 3 - y = -11
=> y = -8, 14

Both: Substituting values of y from statement no. 2 into statement no. 1 doesnt help to solve for y. Hence my answer is E, however the correct answer is C.

Please help,

Thanks in advance,
monusangeeta
Top
Source: — Data Sufficiency |
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 » Thu Sep 30, 2010 7:43 am
monusangeeta wrote:Dear Experts,

Please help me with this question...

What is the value of y?

(1) 3|x^2 - 4| = y - 2

(2) |3 - y| = 11

My approach:

Statement 1: Insuff as there are 2 variables
Statement 2: Insuff

3-y = 11, 3 - y = -11
=> y = -8, 14

Both: Substituting values of y from statement no. 2 into statement no. 1 doesnt help to solve for y. Hence my answer is E, however the correct answer is C.

Please help,

Thanks in advance,
monusangeeta
even IMO E.Lets see what experts have to say on this!!
Top
Master | Next Rank: 500 Posts
Posts: 174
Joined: Fri Apr 02, 2010 3:41 pm
Thanked: 6 times
Followed by:1 members

by sanabk » Thu Sep 30, 2010 10:05 am
(1) 3|x^2 - 4| = y - 2

y=2+3|x^2 - 4|= always a +ve value, regardless of x = +ve or -ve.

NOT SUFFICIENT

(2) |3 - y| = 11

y=-8 if y is +ve
y=14 if y is -ve

NOT SUFFICIENT

1)+2) y is +ve so y=-8.
SUFFICIENT
C
Top
User avatar
Community Manager
Posts: 991
Joined: Thu Sep 23, 2010 6:19 am
Location: Bangalore, India
Thanked: 146 times
Followed by:24 members

by shovan85 » Thu Sep 30, 2010 10:08 am
sanabk wrote:(1) 3|x^2 - 4| = y - 2

y=2+3|x^2 - 4|= always a +ve value, regardless of x = +ve or -ve.

NOT SUFFICIENT

(2) |3 - y| = 11

y=-8 if y is +ve
y=14 if y is -ve

NOT SUFFICIENT

1)+2) y is +ve so y=-8.
SUFFICIENT
C
Great work!!
Top
Post new topic Post Reply
• Page 1 of 1