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Algebra
Pregunta

A chemist needs a \( 20 \% \) solution of alcohol....

A chemist needs a \( 20 \% \) solution of alcohol. She has a \( 15 \% \) solution on hand, as well as a \( 30 \% \) solution. How many liters of the \( 15 \% \) solution should she add to 

\( 3 L \) of the \( 30 \% \) solution to obtain the \( 20 \% \) solution? 

Answer

6 litres 

Solución
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