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Didn't expect a 590

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Intern
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Didn't expect a 590 [#permalink] New post 09 Dec 2003, 19:36
Hi,

I'm new to this board, but after reading some of these messages, I already feel a lot better. I totally didn't expect a 590 because I thought studied enough and my scores on practice tests were alright:
Kaplan Diagnostic 660, Cat #1 580, Cat #2 620
Powerprep #1 640, powerprep #2 730
The second one was taking recently, and I admit that I've done some of the questions on the powerprep before the test.

What surprised me the most is that the test was MUCH HARDER than I expected. I was hit with probability questions from the beginning, and my sentence corrections were paragraphs, none of those 1 or 2 sentence easy stuff. From reading the web, most people scored close to their powerprep scores, and posted that the real GMAT was much easier than the Kaplan cats.
My biggest problem is my time management on the math section (I was trying to do the hard questions in the beginning - b/c of how people said the 10-15 questions are the most important, and ended up not having enough time at the end), and I have to study harder on my verbal.

Anyway, I was wondering:
1) I've done the last 100 so questions of the DS & WP, all of the SC & last 100 of CR & RC in the OG. Today, I did 40 DS in OG in about 40 minutes and only got 1 wrong. I feel like I should be studying something harder. Is it worth it to do the rest of the OG?
2) I've also done most of the Kaplan 2003 CD - problem sets, and most of the kaplan books (i also have 800 & verbal) repeat themselves, so what else is there to do?
From reading your postings, it looks like PR isn't any good.

I want to take the test again in a month, and was wondering what's the best strategy? Any suggestions will be appreciated.
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Director
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 [#permalink] New post 09 Dec 2003, 19:45
It's plausible (though not likely) that you just had a bad test. Especially if you're batting .970 in OG data sufficiency.

If you study probability, they should be the easiest questions on the test, so bone up on that. One poster suggested picking up the Schaum Guide.

What was your split?
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 [#permalink] New post 09 Dec 2003, 21:04
It was something like:
41 64%
30 60%

I know I could definitely improve on verbal. I'm just surprised at the math. I just took the sample math on http://www.800score.com to see if it's worth buying their cat tests, but i just got a 34/37 score. It's kind of easy though. I think I might have gotten some hard questions in the beginning, freaked out, and just lost it for verbal.
But any other study guides I should follow? (harder math questions? )

Thanks!
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 [#permalink] New post 09 Dec 2003, 21:09
I'll check out your recommendation on probability.
By the way, I got such a question:

In a music class, there are 10 students playing violin, 15 students playing piano, and 7 students playing trumpets. 3 students play all 3, and 20 students play two instruments. How many play only 1 instrument?
(I'm trying to remember the best I can, so if this doesn't make sense, apologies in advance). How do you solve this?

Thanks.
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 [#permalink] New post 09 Dec 2003, 21:49
sn157 wrote:
I'll check out your recommendation on probability.
By the way, I got such a question:

In a music class, there are 10 students playing violin, 15 students playing piano, and 7 students playing trumpets. 3 students play all 3, and 20 students play two instruments. How many play only 1 instrument?
(I'm trying to remember the best I can, so if this doesn't make sense, apologies in advance). How do you solve this?

Thanks.


don't worry. keep the spirit high and start working on the weak areas.
good luck..!

anyways..ans to your ques:

see the attachment herewith..
X=3
P+V+T+X+(PT+VT+VP) = total
P+V+T+3+20 = 10+15+7
GIVES 9.
Attachments

untitled.JPG
untitled.JPG [ 41.36 KiB | Viewed 804 times ]

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 [#permalink] New post 10 Dec 2003, 00:23
When did you take it?
In December?
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 [#permalink] New post 10 Dec 2003, 06:26
The question you asked is pretty easy. It sounds like you just got beat by the jitters.
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 [#permalink] New post 10 Dec 2003, 08:51
I took it in December btw.

Also, I'm still pondering about this question. Shouldn't it be:
Total = 3(# of people playing all three) + 2(# of people playing only 2) +
# of people playing only 1 ?
& Total = people playing violin + people playing trumpet + people playing piano. In the example I gave previously, the math doesn't add up - maybe I remembered the numbers wrong.

Say if:
# of people playing all 3 instruments is 3
# of people playing 2 instruments is 10


Piano: 15

A B C
D E F G H I J K L M
N O

Trumpet: 15

A B C
D E F G H I J K L M
P Q

Violin: 7
A B C
R S T U

So total = 15+15+ 7 = 37
= 3(3) + 2(10) + 8 = 37
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 [#permalink] New post 22 Dec 2003, 16:23
Why did you use the number of instruments played as a quantitative factor? The number of instruments played should be used ONLY as a qualitative qualifier and thus should have no bearing on the final answer.
I think the best explanation to this is given by DJ with the Venn diagram. Otherwise, the formula should be:

# of students playing 1 instrument = sum of the # of students playing either instruments - # of students playing 2 instruments - # of students playing all 3 instruments.

And according to the second set of numbers given in your other question:

# of students playing 1 instrument = (15+15+7) - (10) - (3) = 24
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 [#permalink] New post 23 Dec 2003, 13:02
IMO the numbers provided are not correct. Refering to the VENN diagram posted above, the solution should be

P+V+T = TotalPiano + TotalViolin + TotalTrumpet - 2VP - 2PT -2VT -3X
= 10+15+7 - 2*(VP+PT+VT) - 3X
= 32 - 2*20 - 3*3
  [#permalink] 23 Dec 2003, 13:02
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