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# DS - kaplan

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Senior Manager
Joined: 20 Feb 2006
Posts: 333
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Kudos [?]: 3 [0], given: 0

DS - kaplan [#permalink]  08 Jul 2006, 23:39
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
which one ?
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Current Student
Joined: 29 Jan 2005
Posts: 5289
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Kudos [?]: 91 [0], given: 0

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.
Senior Manager
Joined: 20 Feb 2006
Posts: 333
Followers: 1

Kudos [?]: 3 [0], given: 0

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..
Current Student
Joined: 29 Jan 2005
Posts: 5289
Followers: 17

Kudos [?]: 91 [0], given: 0

(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.
GMAT Instructor
Joined: 04 Jul 2006
Posts: 1278
Followers: 9

Kudos [?]: 69 [0], given: 0

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...
VP
Joined: 02 Jun 2006
Posts: 1278
Followers: 2

Kudos [?]: 15 [0], given: 0

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.

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