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DS - kaplan [#permalink] New post 08 Jul 2006, 23:39
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
which one ?
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 [#permalink] New post 08 Jul 2006, 23:55
Looks like (C).

Statement 1: We don`t know her savings rate ---> Insuff

Statement 2: We don`t know the starting balance. ---> Insuff

Together we can calculate and subtract from the total. ---> No.
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 [#permalink] New post 09 Jul 2006, 00:19
GMATT73 wrote:
Looks like (C).

Statement 1: We don`t know her savings rate ---> Insuff

Statement 2: We don`t know the starting balance. ---> Insuff

Together we can calculate and subtract from the total. ---> No.



I guess you wanted to say YES in last statement.. I also chose C. But the Kaplan answer is B, which i also felt as wrong..
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 [#permalink] New post 09 Jul 2006, 00:30
(B) is only correct if her current starting balance is 0. In which case she would have saved $13,200 (at 0 interest).

13,200-110= a future balance greater than 12,000

I made the mistake of assuming which should strictly be avoided with GMAT math. Kaplan is notorious for such ambiguity. :x
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 [#permalink] New post 09 Jul 2006, 16:08
I'm a Kaplan trainer, so I guess I ought to defend the company here. If she saved $110 this month, she will save $110 for each of the next 120 months. The balance will increase by 110(120) dollars, certainly more than $12,000. We don't know about bank charges, though- they can kill you here in Madrid...
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 [#permalink] New post 09 Jul 2006, 19:28
Answer: B

Let m = monthly saving
C = current amount in account
C10 = Amount in account after 10 years

Given C10 = C+ mx10
Also C10 > C+12000

Using the above two : m > 1200

S1: Is C10 = 20000?
Cannot say, depends on m and C
Not sufficient.

S2: m >= 110. Yes, as m > 1200, this is true.

Answer: B.
  [#permalink] 09 Jul 2006, 19:28
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