Answer:20 ounce
Step-by-step explanation
Given
2 parts Grape juice is present in 6 parts of water
Let us suppose Grape part be g and water part be w in the mixture
Also it is given 80 ounce of grape Juice is needed to make
thus
g+w=80
also grape to water ratio is[tex]\frac{2}{6}[/tex]
[tex]\frac{1}{3}=\frac{g}{w}[/tex]
[tex]g=w\times \frac{1}{3}[/tex]
Substituting values
we get
[tex]w\frac{1}{3}+w=80[/tex]
w=60 ounce
thus grape is 20 ounce