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DS pls explain

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by moonlite » Thu Oct 02, 2008 1:05 pm
From May 1 to May 30 in the same year, the balance in a checking account increased.
What was the balance in the checking account on May 30?

(1) If, during this period of time, the increase in the balance in the checking
account had been 12 percent, then the balance in the account on May 30 would
have been $504
(2) During this period of time, the increase in the balance in the checking account
was 8 percent.


OA is A

The question is asking for an amount so don't we need both the statements? Pls explain. Thanks.
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Source: — Data Sufficiency |
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Re: DS pls explain

by Morgoth » Thu Oct 02, 2008 1:20 pm
moonlite wrote:From May 1 to May 30 in the same year, the balance in a checking account increased.
What was the balance in the checking account on May 30?

(1) If, during this period of time, the increase in the balance in the checking
account had been 12 percent, then the balance in the account on May 30 would
have been $504
(2) During this period of time, the increase in the balance in the checking account
was 8 percent.


OA is A
Statement (1)

let the initial balance be x

12% increase = 1.12x
1.12x = 504

You can solve for x.

but the question is "the balance in a checking account increased.
What was the balance in the checking account on May 30"

now we can only find the initial amount not the "increase"

Statement (2) this one is clearly insufficient.

Combining (1) & (2) we get the answer.

I think the answer should be C not A.

Anybody knows what am I missing ?
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by moonlite » Thu Oct 02, 2008 2:03 pm
That's what i thought too.. answer should be C. Not sure what i'm missing or if the OA is wrong.
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by Rashmi1804 » Fri Mar 20, 2009 11:55 am
My pick is C too...

for the same approach .....i think the OA is wrong...

anybody who got the answer A ??
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by Tryingmybest » Fri Mar 20, 2009 12:18 pm
one more Vote for C
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by lilu » Fri Mar 20, 2009 2:34 pm
I also vote for C
The first statement gives principal and the second statement gives us rate, so we need both to find out the end balance.
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by nieves » Sat Apr 11, 2009 4:17 am
I had the same doubt. It could not be a. There is not enough info.

Sign me up for c!
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by vittalgmat » Sun Apr 12, 2009 12:56 am
C for me as well
The problem is not worded well!
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by palvarez » Sun Oct 25, 2009 9:07 am
The problem is correctly worded. The problem lies with those who read the question.

(1) states a past counter factual. The question is about past-factual.
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