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Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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08 Nov 2010, 14:02
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70% (02:43) correct 30% (02:47) wrong based on 856 sessions
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Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Project PS Butler : Question #106
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Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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06 Apr 2012, 13:19
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7
rovshan85 wrote:
Solution Y is 30% liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kg of solution Y and 2 kg of solution Y are added to the remaining 6 kg of liquid, what percent of this new solution is liquid X?
a. 30 b. 33 1/3 c. 37 1/2 d. 40 e. 50
What is the easiest way to approach this type of problem and solve under 2 min.
In 8 kilograms of solution Y there are 0.3*8=2.4 kilograms of solution X;
After 2 kilograms of water are replaced by 2 kilograms of solution Y, to the existing 2.4 kilograms of solution X, 0.3*2=0.6 kilograms of solution X are added, so in the new solution of 8 kilograms there are 2.4+0.6=3 kilograms of solution X, which is 3/8*100=37.5% of this new solution.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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09 Nov 2010, 00:01
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Answer:C Took time to solve this one, the statement 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid was confusing to me. After thinking more deeply, it was clear to me that new 2 kg of solution Y will also be 30% liquid X and 70% water, and then I was able to get the answer. That was a bit tricky and nice question. Kudos +1 for posting the question _________________
"I choose to rise after every fall" Target=770 http://challengemba.blogspot.com Kudos??
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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09 Nov 2010, 00:25
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Initially you start with 8kg of solution which has 2.4kg of X and 5.6kg of water Post evaporation : 2.4kg of X and 3.6kg of water Now we add back 2kg of Y --> 1.4Kg water + 0.6Kg X So we have left 5Kg Water & 3Kg X
Percentage concentration is (3/5)*100 or 37.5%
_________________
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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09 Nov 2010, 00:43
shrouded1 wrote:
Initially you start with 8kg of solution which has 2.4kg of X and 5.6kg of water Post evaporation : 2.4kg of X and 3.6kg of water Now we add back 2kg of Y --> 1.4Kg water + 0.6Kg X So we have left 5Kg Water & 3Kg X
Percentage concentration is (3/5)*100 or 37.5%
Yea, that's exactly how I solved but you know at first I was kinda adding 2 to 6 kg without considering liquid X and water's concentration within 2 kg being added.
_________________
"I choose to rise after every fall" Target=770 http://challengemba.blogspot.com Kudos??
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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11 Dec 2011, 23:43
Initially we have 8kg of solution which has 3/10 0f 8= 2.4kg of X and 7/10 of 8 = 5.6kg of water after evaporation : 2.4kg of X and 3.6kg of water Now we added 2kg of solution Y --> 7/10 of 2=1.4Kg water + 3/10 0f 2 =0.6Kg X So we have left 5Kg Water & 3Kg X
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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26 Aug 2013, 21:32
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rovshan85 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solution Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
What is the easiest way to approach this type of problem and solve under 2 min.
1. The net effect of 2 kg of water evaporating and adding 2 kg of the solution is removing (-2 + 1.4 = -0.6) 0.6 kg of water and adding 0.6 kg of liquid 2 Therefore the changed solution contains, 2.4 + 0.6 = 3 kg of liquid and 5.6-0.6==5 kg of water. 3. Percentage of liquid is 3/8 * 100 % = 37 1/2 %
_________________
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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05 Jan 2016, 05:55
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rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
The best way to solve these problems is to take one step at a time
Initial: 8 kg Solution Y This means Solution X = 2.4 kg, Water = 5.6 kg
Step 2: 2 kg of water is evaporated. Left over: Solution X = 2.4 kg and Water = 3.6 kg
Step 3: 2 kg of Solutoin Y is added Or, 0.6 kg of Solution X and 1.4 kg of water is added
Final: Solution X = 3, Water = 5 % of solution X = 3/8 * 100 = 37.5%
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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03 May 2016, 07:47
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Hi,
I like using a table for mixture problems. This is what I came up with (see attachement):
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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Updated on: 28 Feb 2018, 22:08
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
let x=% of liquid X in new solution .3*8+.3*2=x(6+2) x=3/8=37.5% C
Originally posted by gracie on 18 Jul 2016, 20:23.
Last edited by gracie on 28 Feb 2018, 22:08, edited 1 time in total.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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22 Sep 2018, 06:52
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DS00 wrote:
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Hi,
I like using a table for mixture problems. This is what I came up with (see attachement):
I also used the similar approach. To Sum up: Initial 8 kilograms of Y consist of 2.4 kg X and 5.6 kg water. We then lose 2 kg water to evaporation, so we are down to 3.6 kg water. The final step adds 2 kg Y, which consists of .6 kg X and 1.4 kg water. Therefore, the final mixture contains 3 kg X and 5 kg water. 3/8 = 37.5%.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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29 Dec 2018, 02:52
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Project PS Butler : Question #106
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8 kg of the solution contains (8*0.3) kg = 2.4 kg of X
again,
2 kg of the add solution which is added will have 2*0.3 = 0.6 kg of X
Total final volume of the solution = 8 kg
Hence, % of X = (2.4+0.6)/8*100 = 3/8 * 100 =3* 12.5 = 37.5 %
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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22 Jan 2019, 17:14
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
My reasoning:
8kg original solution is 30% X and 70% water or \(\frac{24}{10}kg liquid X and \frac{56}{10}kg water\)
Since we are looking for the percent of liquid X in our mixture we don't really care about the water in our solution.
We know that the total weight is 8kg and we are adding 2kg of solution Y, which has \(\frac{6}{10}kg liquid X\).
\(\frac{24}{10} + \frac{6}{10} = 3kg\) liquid X in the total solution.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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28 Jan 2019, 14:05
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Project PS Butler : Question #106
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Solution Y is 30 percent liquid X and 70 percent water
Total 8 litres
8 *0.3 = 2.4 kg liquid
5.6 kg = water
2 kilograms of water evaporate from 8 kilograms of solutions Y
so 5.6 -2 = 3.6 water is left
afterwards 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid
Since, solution Y cosists of 30 percent is liquid X and 70 percent is water
hence 2 *0.3 = 0.6 kg is liquid and 2-0.4 = 1.4 is water
2.4 +0.6 = 3 kg liquid
3.6+1.4 = 5 kg water
what percent of this new liquid solution is liquid X?
\(\frac{3}{8} = 0.37\)
gmatclubot
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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28 Jan 2019, 14:05
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70% (02:43) correct 
