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KK9_GMAT
- Newbie | Next Rank: 10 Posts
- Posts: 6
- Joined: Sat Jul 18, 2009 2:51 am
- Location: UK
- GMAT Score:650
Hi,
I came upon this data sufficiency problem in the Manhattan GMAT Cat 2.
I am trying to understand the explanation provided but no luck so far. Can anyone help me out? Is this some basic concept I have missed out on?
Thanks! Here is the question....The underlined sentence is what confuses me and is something I cannot understand.
Q What is the value of y?
(1) 3|x^2 -4| = y - 2
(2) |3 - y| = 11
A (1) INSUFFICIENT: Since this equation contains two variables, we cannot determine the value of y. We can, however, note that the absolute value expression |x^2 -4| must be greater than or equal to 0. Therefore, 3|x^2 -4| must be greater than or equal to 0, which in turn means that y - 2 must be greater than or equal to 0. If y - 2 > 0, then y > 2.[/b]
I came upon this data sufficiency problem in the Manhattan GMAT Cat 2.
I am trying to understand the explanation provided but no luck so far. Can anyone help me out? Is this some basic concept I have missed out on?
Thanks! Here is the question....The underlined sentence is what confuses me and is something I cannot understand.
Q What is the value of y?
(1) 3|x^2 -4| = y - 2
(2) |3 - y| = 11
A (1) INSUFFICIENT: Since this equation contains two variables, we cannot determine the value of y. We can, however, note that the absolute value expression |x^2 -4| must be greater than or equal to 0. Therefore, 3|x^2 -4| must be greater than or equal to 0, which in turn means that y - 2 must be greater than or equal to 0. If y - 2 > 0, then y > 2.[/b]
