Try the following ACT math practice question that tests your understanding of mixture questions.

How many liters of a $12$ percent alcohol solution must be added to $6$ liters of a $24$ percent alcohol solution to obtain a solution that is $15$ percent alcohol?

- $\quad 9$
- $\quad 15$
- $\quad 18$
- $\quad 20$
- $\quad 24$

**Video Explanation**

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