Answer:
The greatest amount of fizzy drink he can make is 420 ml
Explanation:
we know that
The ratio of the parts of orange juice to parts of lemonade is
![(5)/(2)](https://img.qammunity.org/2020/formulas/mathematics/high-school/wwwcpic2mfe3m1tpyy92p1zim4oiu3rz51.png)
so
using proportion
Find out the milliliters of lemonade needed to make fizzy drink with 300 ml of orange juice
Let
x -----> milliliters of lemonade needed
![(5)/(2)=(300)/(x)\\\\x=300*2/5\\\\x=120\ ml](https://img.qammunity.org/2020/formulas/mathematics/middle-school/rywdauewsj5gk8dfv1ngm027pidjy3o3xz.png)
Find the greatest amount of fizzy drink he can make
Adds the milliliters of lemonade plus the milliliters of orange juice
![120+300=420\ ml](https://img.qammunity.org/2020/formulas/mathematics/middle-school/4pep61yyxtzhv2bo4j2iar7uvim9lp729g.png)
therefore
The greatest amount of fizzy drink he can make is 420 ml