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Mixture Problems

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by swerve » Tue Apr 15, 2025 8:38 am

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A

B

C

D

E

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Difficulty

In a particular dilution technique, \(10\%\) of the solution is removed and replaced with the diluter. If we start with pure alcohol, minimum how many times would the operation need to be performed to bring the percentage of alcohol below \(65\%.\)

A. \(3\)
B. \(4\)
C. \(5\)
D. \(6\)
E. \(7\)

The OA is C
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