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Updated on: 10 Jul 2019, 04:45
Originally posted by Bunuel on 14 Apr 2019, 04:20.
Last edited by Sajjad1994 on 10 Jul 2019, 04:45, edited 1 time in total.
Last edited by Sajjad1994 on 10 Jul 2019, 04:45, edited 1 time in total.
Added Source
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
92% (01:11) correct
8%
(02:04)
wrong
based on 155
sessions
History
Date
Time
Result
Not Attempted Yet
How many ounces of a solution that is 30 percent salt must be added to a 50-ounce solution that is 10 percent salt so that the resulting solution is 20 percent salt?
(A) 20
(B) 30
(C) 40
(D) 50
(E) 60
(A) 20
(B) 30
(C) 40
(D) 50
(E) 60
Source: Nova GMAT
Difficulty Level: 550
Difficulty Level: 550
Archit3110
Major Poster
14 Apr 2019, 04:33
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Bunuel
let x ounces of solution be added
amount of the salt in the resulting solution: 5+0.30x
amount of the resulting solution: 50+x
20% = 20/100; 1/5
given (5+0.30x)/(50+x)=1/5
=>3/2*x-x=50-25
=> x=50
IMO D
