By dzyubam
- **Jan 16**, 02:00 AM

Math (PS)
There are four distinct pairs of brothers and sisters. In how many ways can a committee of 3 be formed and NOT have siblings in it?
(A) 8
(B) 24
(C) 32
(D) 56
(E) 80
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By dzyubam
- **Jan 13**, 02:00 AM

Math (PS)
4 professors and 6 students are being considered for membership on a supervisory committee which must consist of 3 people. In how many ways can this committee be formed if it has to include at least 1 professor?
(A) 36
(B) 60
(C) 72
(D) 80
(E) 100
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By Magoosh
- **Jan 12**, 16:44 PM

Everyone knows add, subtract, multiply, and divide, but the factorial symbol is slightly more obscure. It will not come up very frequently on the GMAT math, but with the knowledge of just a few facts about factorials, you will be able to master this...

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By Kaplan
- **Jan 12**, 11:22 AM

By Lucas Weingarten
As a Kaplan GMAT instructor, I work with a lot of different people. Some of those people feel most challenged by the Verbal section of the test, while others feel most challenged by the Quant section. Either way—or even if you...

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By dzyubam
- **Jan 12**, 03:00 AM

Math (PS)
Which of the following is closest to ?
(A) 1.997
(B) 1.998
(C) 1.999
(D) 2.000
(E) 2.001
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By dzyubam
- **Jan 11**, 02:00 AM

Math (DS)
How many different numbers are there such that ( , , and are known) ?
1.
2.
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By dzyubam
- **Jan 10**, 02:00 AM

Math (DS)
What is the value of ?
1.
2.
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By dzyubam
- **Jan 9**, 02:00 AM

Math (PS)
Three secretaries working together can type 36 pages of text in half an hour. If the typing speeds of the secretaries are in a 4:3:2 ratio, how long will it take the slowest-typing secretary working alone to type 52 pages of text?
(A) 1 hour...

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By dzyubam
- **Jan 6**, 02:00 AM

Math (PS)
Set consists of all points such that . If point is selected from set at random, what is the probability that ?
(A)
(B)
(C)
(D)
(E)
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By dzyubam
- **Jan 5**, 02:00 AM

Math (DS)
1000 dollars were converted into pounds and then the pounds were converted back into dollars at the same exchange rate of pounds per dollar. If a commission of is levied on any exchange operation, what dollar amount was left after the exchanges?
1....

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