Search found 14 matches
This is how I approached the problem: Let's say you first pick a red, then another red, then a green apple. The probability would be (7/10)(6/9)(3/8)=7/40 You must next consider the number of different arrangements, and I believe this is where most make mistakes. RRG RGR GRR or if you like combinati...
- by smithpa2
Sat Sep 27, 2008 2:47 pm- Forum: Data Sufficiency
- Topic: Probability Question
- Replies: 4
- Views: 1907
I've seen this problem before, consider this:
If v does equal 0, then:
vw=v^2, divide by v
v=w, and the stem specifically says that v and w are different integers.
thus A is the correct answer.
- by smithpa2
Sat Sep 27, 2008 1:58 pm- Forum: Data Sufficiency
- Topic: GMAT Prep DS Question...Pls Help
- Replies: 2
- Views: 1363
GMAT Prep
This problem is fairly simple and I came to the right answer, I just can't remember the underlying reason of how I did it. Come someone shed some light on this please?
- by smithpa2
Fri Sep 26, 2008 2:35 pm- Forum: Problem Solving
- Topic: GMAT Prep
- Replies: 1
- Views: 1344
GMAT PREP
Can someone address this question please? I apologize if it has already been posted in another thread.
- by smithpa2
Mon Sep 22, 2008 2:30 pm- Forum: Data Sufficiency
- Topic: GMAT PREP
- Replies: 2
- Views: 1313
- by smithpa2
Mon Sep 22, 2008 2:27 pm- Forum: Data Sufficiency
- Topic: GMAT Prep DS
- Replies: 4
- Views: 1567
IMO E.
Y could be both positive or negative.
For example:
x=25 y=-10, then x+y<20
x=15, y=1, then x+y<20
- by smithpa2
Mon Sep 22, 2008 10:56 am- Forum: Data Sufficiency
- Topic: gmat prep
- Replies: 4
- Views: 2870
You could plug in some numbers., for example, x=3 y=2
x+y=a or 3+2=5 and x-y=b or 3-2=1.
Then 2xy=2*3*2= 12 and a^2-b^2/2 = (25-1)/2=12
- by smithpa2
Mon Sep 22, 2008 7:38 am- Forum: Problem Solving
- Topic: faster way to solve Algebra problem??
- Replies: 5
- Views: 3202
- by smithpa2
Sun Sep 21, 2008 6:24 pm- Forum: Data Sufficiency
- Topic: GMAT Prep
- Replies: 1
- Views: 1251
- by smithpa2
Sun Sep 21, 2008 6:11 pm- Forum: Data Sufficiency
- Topic: GMAT Prep DS
- Replies: 4
- Views: 1567
- by smithpa2
Sun Sep 21, 2008 5:59 pm- Forum: Problem Solving
- Topic: GMAT Prep question 2
- Replies: 1
- Views: 1154
- by smithpa2
Sun Sep 21, 2008 5:57 pm- Forum: Problem Solving
- Topic: GMAT Prep
- Replies: 1
- Views: 1065
- by smithpa2
Sat Sep 13, 2008 5:58 pm- Forum: Problem Solving
- Topic: GMATPrep
- Replies: 5
- Views: 1714
One method you couold try is to factor our common terms. For instance, you could factor out (1/(2^2*5^2) from value.
A) 6
B) 1/2
C) 28/5
D) 62/(2*5)
E) 122/(2^2*5)
- by smithpa2
Thu Sep 04, 2008 10:09 am- Forum: Problem Solving
- Topic: fractions
- Replies: 2
- Views: 1486
One thing to consider is that xy>0, so both x and y are either positive or negative, but can't equal 0.
IMO A, b/c 2 is the only number that satisfies the criterion.
- by smithpa2
Thu Sep 04, 2008 9:55 am- Forum: Data Sufficiency
- Topic: inequalities
- Replies: 13
- Views: 2381