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A certain quantity of 40% solution is replaced with 25% solution such
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09 Nov 2022, 06:25
09 Nov 2022, 06:25
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55% (02:10) correct
44% (01:31) wrong based on 27 sessions
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A certain quantity of 40% solution is replaced with 25% solution such that the new concentration is 35%. What is the fraction of the solution that was replaced?
(A) 1/4
(B) 1/3
(C) 1/2
(D) 2/3
(E) 3/4
(A) 1/4
(B) 1/3
(C) 1/2
(D) 2/3
(E) 3/4
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Free Materials for the GRE General Exam - Where to get it!!
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: A certain quantity of 40% solution is replaced with 25% solution such
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09 Nov 2022, 11:36
09 Nov 2022, 11:36
May someone explains the question ?
Re: A certain quantity of 40% solution is replaced with 25% solution such
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09 Nov 2022, 11:56
09 Nov 2022, 11:56
Expert Reply
oringal quantity of solution=1
solution replaced = x
0.4 *(1-x)+0.25x= 0.35 *1
0.05= 0.15 x--> x= 1/3
solution replaced = x
0.4 *(1-x)+0.25x= 0.35 *1
0.05= 0.15 x--> x= 1/3
