Search found 45 matches
50% soln costs 25cents per litre
so a 33% soln costs 16.6cents per litre
There are 3 litres, so 3x16.6 = 50cents
Final Answer = 50cents
- by yeahdisk
Wed May 26, 2010 6:04 am- Forum: Problem Solving
- Topic: proportion water spirit
- Replies: 6
- Views: 1988
Criticise others all you want, the fact remains that the answer is 13 and you've got it wrong again.
- by yeahdisk
Wed Apr 21, 2010 6:10 am- Forum: Problem Solving
- Topic: a lethal accident
- Replies: 18
- Views: 3864
The answer is 13 drinks total
Drink1 = 1/8
Drink2 = 1.2/8
Drink3 = 1.44/8
Drink4 = 1.73/8
Drink5 = 2/8
Drink6 = 2.48/8
Drink7 = 2.99/8
Drink8 = 3.58/8
Drink9 = 4.30/8
Drink10 = 5.16/8
Drink11 = 6.19/8
Drink12 = 7.43/8
Drink13 = 8.9/8
Where is this question from?
- by yeahdisk
Tue Apr 20, 2010 6:19 am- Forum: Problem Solving
- Topic: a lethal accident
- Replies: 18
- Views: 3864
When you have n things to choose from ... you have n choices each time!
So when choosing r of them, the permutations are:
n × n × ... (r times) = n^r
(Because there are n possibilities for the first choice, THEN there are n possibilites for the second choice, and so on.)
3^15
- by yeahdisk
Mon Mar 22, 2010 12:52 pm- Forum: Problem Solving
- Topic: Combination & Permutation
- Replies: 7
- Views: 1452
What is the source of this question?
To me, the answers given only work if C is adjacent to D. This isn't specified in the question.
*edit* actually I just read the second half of Sanju's post - ignore my comment
- by yeahdisk
Mon Mar 15, 2010 4:47 am- Forum: Problem Solving
- Topic: Probability - Permutation Q
- Replies: 8
- Views: 3376
cool - I wasn't sure if 0 counted as an integer on GMAT tests (but - after seeing your reply - I'm guessing it does)
- by yeahdisk
Sun Mar 14, 2010 11:33 am- Forum: Problem Solving
- Topic: Integers that lie on a circle
- Replies: 8
- Views: 1445
- by yeahdisk
Sun Mar 14, 2010 10:00 am- Forum: Problem Solving
- Topic: Integers that lie on a circle
- Replies: 8
- Views: 1445
- by yeahdisk
Sat Mar 13, 2010 4:03 am- Forum: Sentence Correction
- Topic: Kaplan SC
- Replies: 17
- Views: 4783
- by yeahdisk
Sat Mar 13, 2010 4:01 am- Forum: Problem Solving
- Topic: Thoughts please
- Replies: 6
- Views: 1491
I think both are sufficient the first one is obvious the second one: If angle BAC = 90 then AC^2 + AB^2 = BC^2 The only way to change the ratio, without changing the lengths, is to modify the angle BAC... If you increase the angle above 90, then AC^2 + AB^2 < BC^2 If you decrease the angle below 90,...
- by yeahdisk
Thu Mar 11, 2010 7:48 am- Forum: Data Sufficiency
- Topic: ABC triangle
- Replies: 4
- Views: 1378
20 second gap between light
If man appears at any time in the first 15 seconds of this gap he will spend at least 5 seconds in dark
IMO answer is [spoiler]15/20 = 3/4 [/spoiler]
- by yeahdisk
Wed Mar 10, 2010 12:31 pm- Forum: Problem Solving
- Topic: searchlight
- Replies: 8
- Views: 1733
actually I revisit my original answer:
My original answer of 4/52 * 4/51 * 4/50
I ths probability of getting a 9 - 10 - jack in that specific order.
there are 3! combinations of orders of getting those cards, so my final answer is
[spoiler]6 * (4/52 * 4/51 * 4/50)[/spoiler]
- by yeahdisk
Tue Mar 09, 2010 6:44 am- Forum: Problem Solving
- Topic: Basic Probability
- Replies: 6
- Views: 1538
If there are 4 Jacks, 4 tens, 4 nines in every pack of cards (Would this kind of prior knowledge be assumed on the GMAST?)
anyway, IMO answer = [spoiler](4/52) * (4/51) * (4/50)[/spoiler]
- by yeahdisk
Tue Mar 09, 2010 5:18 am- Forum: Problem Solving
- Topic: Basic Probability
- Replies: 6
- Views: 1538
I would argue that the arc method I proposed lets you calculate the distance moved by C usuing conventional methods?
- by yeahdisk
Tue Mar 09, 2010 4:49 am- Forum: Problem Solving
- Topic: Square and Distance
- Replies: 11
- Views: 3445
This question is poorly constructed so I'm struggling to give you a proper answer. As has already been said, you have 119 x 5 letter combinations (discounting AFTER) You have 5C4 * 4! 4 letter combinations (120) You have 5C3 * 3! 3 letter combinations (60) You have 5C2 * 2! 2 letter combinations (20...
- by yeahdisk
Mon Mar 08, 2010 2:52 pm- Forum: Problem Solving
- Topic: How to solve this?
- Replies: 6
- Views: 1209