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TNTGMAT
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Princeton CATS   27 Jul 2007, 23:20
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As far as SC goes I think the best thing to do is practice identifying the idioms (assuming that you have them down) ... Dont try to limit yourself just practice identifying them that helped me a lot.....

I just took Powerprep2 got a 750(Q47, V46) a little inflated saw some previous questions.... will take my GMATprep2 tomorrow...
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Princeton CATS   27 Jul 2007, 23:51
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Good advice! I'll focus on idioms for the rest of the week. I'm pretty much done with the Manhattan SC for OG, will use it on Verbal Guide to try to tough questions...

Funny, I got 750 on PowerPrep2 (Q49, V44) and also saw a few repeated verbal questions... I'll take my GMATPrep2 on Sunday. We're like working in parallel! ;)
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Finding Perdition
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Princeton CATS   28 Jul 2007, 00:34
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kryzak
I probably wouldn't do any more PR or Kaplan if I were you. Just do Manhattan and GMATPrep/PowerPrep.


Dont have Manhattan and i guess i stil have enough time to work around kaplan...they are tough and i should do it now, rather than a week before the test. And i have heard some of their strategies are worth reading...

FP
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TNTGMAT
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Princeton CATS   28 Jul 2007, 16:38
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Hey Kryzak...

Just took GMAT PREP(2).. got a 730... Q(47) V(44).... Had some really difficult SC missed 4/16 on this one well 3 really the last 1 I had to choose as I was running out of time... I owe you one for that RC tip.... i have been able to finish my tests since u gave that to me...
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Princeton CATS   28 Jul 2007, 16:46
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wow, great job tlntd! Congrats! I'll let you know how I do tomorrow.
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Robin in NC
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Princeton CATS   28 Jul 2007, 17:33
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tlntd42
Hey All just took a PowerPrep test scored a 720... (Q49) V(40) ? What do you guys think ? Got some really long passages that slowed me down on the verbal... What do you guys think about PowerPrep tests ? I was going to take a manhattan GMAT but their quant was getting extremely difficult .. (maybe I was doing well ... but I will probably just go over their questions..

Please let me know what you guys think about my score above and if there is anything else I can do to keep going up ...


I also just took a Power Prep test today, got a 730 (45/45). This was significantly higher than the GMAT Prep I took 2 weeks ago (700 - 38/49) But I have studied alot of math in the past 2 weeks. Does anyone have an idea how the Power Prep compares to GMAT Prep? I have 3 weeks till test day, and want to save my last GMATPrep until one week before.
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Princeton CATS   28 Jul 2007, 19:55
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I would like to post attachments for some problems I was working on can anyone tell me why I am not allowed to ?
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TNTGMAT
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Princeton CATS   28 Jul 2007, 20:13
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There are 8 magazines lying on a table; 4 are fashion magazines and the other 4 are sports magazines. If 3 magazines are to be selected at random from the 8 magazines, what is the probability that at least one of the fashion magazines will be selected ?

A)1/2

B) 2/3

C) 32/35

D) 11/12

E)13/14


I know its combinations but i cant seem to get the answer
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Princeton CATS   28 Jul 2007, 20:22
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tlntd42
There are 8 magazines lying on a table; 4 are fashion magazines and the other 4 are sports magazines. If 3 magazines are to be selected at random from the 8 magazines, what is the probability that at least one of the fashion magazines will be selected ?

A)1/2

B) 2/3

C) 32/35

D) 11/12

E)13/14


I know its combinations but i cant seem to get the answer


You might want to post this question in the math section. But here's how I'd solve it -
In this case I think it's easier to solve for the probability that none of the magazines selected will be fashion, then subtract that number from 1. If there are 8 magazines, 4 of each, the probability that the first magazine selected is sports is 4/8, or 1/2. That leaves 7 magazines to choose from, 3 of which are sports. So the probability that the second one chosen is sports is 3/7. That leaves 6 with 2 sports, so the third probability is 2/6, or 1/3. Multiply those together: 1/2x3/7x1/3, for a total probability of getting all sports magazines = 1/14. So the opposite probability, i.e. that at least one of the magazines is fashion, = 1 - 1/14, or 13/14.

Clear as mud?
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TNTGMAT
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Princeton CATS   28 Jul 2007, 20:30
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I was thinking along these lines...

Prob= (#comb satisfactory/total # of combinations)


so out of 8 magazines we choose 3 so we have 56 possible combinations of magazines. then I was trying to figure out the numerator ... I understand how u are solving it but it feels like a combination question...
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Robin in NC
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Princeton CATS   28 Jul 2007, 20:45
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tlntd42
I was thinking along these lines...

Prob= (#comb satisfactory/total # of combinations)


so out of 8 magazines we choose 3 so we have 56 possible combinations of magazines. then I was trying to figure out the numerator ... I understand how u are solving it but it feels like a combination question...


Probability and combinations are really two different animals, with different formulas, etc. The biggest difference is that with a probability problem, the answer is going to be less than 1, whereas with a combinations problem you are multiplying. The formula you are using for probability is confusing because you are using the word "combinations" where it should be "events".

If you wanted to know how many different arrangements of the three magazines you chose there could be, that would be a combinations problem (8C3). But the question didn't ask that, it asked the probability of one of the magazines being a fashion magazine. This seems like an area where the GMAT might try to trip us up!
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TNTGMAT
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Princeton CATS   28 Jul 2007, 21:48
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Robin,

Here is how its done using combinations
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Princeton CATS   28 Jul 2007, 21:49
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There are 8C3=56 ways to choose 3 magazines. Within these 56 ways, there are 4C3=4 ways to chose the sports only. So, the probability that we select no fashion magazines is 4/56. Thus, the probability that at least one fashion magazine is chosen is 1-(4/56)=52/56=13/14.
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Princeton CATS   29 Jul 2007, 07:12
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tlntd42
There are 8C3=56 ways to choose 3 magazines. Within these 56 ways, there are 4C3=4 ways to chose the sports only. So, the probability that we select no fashion magazines is 4/56. Thus, the probability that at least one fashion magazine is chosen is 1-(4/56)=52/56=13/14.


That's what I love about this forum - I learn something new every day! Thanks.
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