Respuesta :
Answer:
[tex]\frac{1}{2}[/tex] gallon
Step-by-step explanation:
The mix is [tex]$\frac{2}{2+3+1}=\frac13$[/tex] blue paint, [tex]$\frac12$[/tex] white paint, and [tex]$\frac16$[/tex] red paint. He therefore needs [tex]$\frac36=\boxed{\frac12}$[/tex] gallons of red paint.
Hope this helped! :)