Two solutions of acid were mixed to obtain 10 liters of new solution. Before they were mixed, the first solution contain

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Vincen: Legendary Member; Posts: 2898; Joined: Thu Sep 07, 2017 2:49 pmFollowed by: 5 members; Thanked: 6 times

by Vincen » Sat Mar 06, 2021 11:12 pm

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Two solutions of acid were mixed to obtain 10 liters of new solution. Before they were mixed, the first solution contained 0.8 liters of acid while the second contained 0.6 liters of acid. If the percentage of acid in the first solution was twice that in the second, what was the volume of the first solution?

A. 3 liters
B. 3.2 liters
C. 3.6 liters
D. 4 liters
E. 4.2 liters

Answer: D

Source: GMAT Club Tests

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Source: Beat The GMAT — Problem Solving | Sat Mar 06, 2021 11:12 pm

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