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Some part of a \(50\%\) solution of acid was replaced with an equal amount of \(30\%\) solution of acid. If, as a result, \(40\%\) solution of acid was obtained, what part of the original solution was replaced?
A. \(\dfrac15\)
B. \(\dfrac14\)
C. \(\dfrac12\)
D. \(\dfrac34\)
E. \(\dfrac45\)
Answer: C
Source: GMAT Club Tests
A. \(\dfrac15\)
B. \(\dfrac14\)
C. \(\dfrac12\)
D. \(\dfrac34\)
E. \(\dfrac45\)
Answer: C
Source: GMAT Club Tests
