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# If P and R were solutions of water and ammonia and if

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VP
Joined: 26 Apr 2004
Posts: 1142
Location: Taiwan
If P and R were solutions of water and ammonia and if  [#permalink]

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05 Dec 2004, 07:05
1
13
00:00

Difficulty:

25% (medium)

Question Stats:

72% (01:31) correct 28% (01:54) wrong based on 538 sessions

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If P and R were solutions of water and ammonia and if solution S consisted of 2 parts of P and 3 parts of R, what percent of solution S was ammonia?

(1) Solution P contained 10 percent ammonia and solution R contained 3 percent ammonia.
(2) There was a total of 10 liters of solution S.
Manager
Joined: 19 Nov 2004
Posts: 58

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07 Dec 2004, 07:38
4
I agree with A
Let a-ammonia
w-water
then P= 0.1a+0.9w
R=0.03a+0.97w
S=2P+3R=2(0.1a+0.9w)+3(0.03a+0.97w)=0.29a+4.71w
then water is 94.2% and ammonia 5.8%

Am I right?
Manager
Joined: 18 Oct 2013
Posts: 72
Location: India
Concentration: Technology, Finance
GMAT 1: 580 Q48 V21
GMAT 2: 530 Q49 V13
GMAT 3: 590 Q49 V21
WE: Information Technology (Computer Software)
Re: If P and R were solutions of water and ammonia and if  [#permalink]

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26 Nov 2013, 12:15
3
Easy One.
Given: Solution S consisted of 2 parts of P and 3 parts of R.
Find: %ammonia in S= ?
1) Sufficient. If Solution P contained 10 percent ammonia and solution R contained 3 percent ammonia then
Concentration of final sol = {(2X)(.1) + (3X)(.03) }*100/ 5X
=29/5
=5.8%
Eliminate B,C,E.
2) No Sufficient.Eliminate D

Non-Human User
Joined: 09 Sep 2013
Posts: 9156
Re: If P and R were solutions of water and ammonia and if  [#permalink]

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04 Sep 2018, 10:02
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: If P and R were solutions of water and ammonia and if &nbs [#permalink] 04 Sep 2018, 10:02
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